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Ovadia M, Gluska H, Cohen G, Schreiber H, Biron-Shental T, Kovo M, Shechter-Maor G. Does decreased fetal growth estimation in the appropriate for gestational age range affect delivery outcomes? Arch Gynecol Obstet 2024; 310:1461-1465. [PMID: 38411630 DOI: 10.1007/s00404-024-07432-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Accepted: 02/12/2024] [Indexed: 02/28/2024]
Abstract
PURPOSE To study the effect of decreased estimated fetal weight (EFW) percentiles in appropriate for gestational age fetuses. METHODS This retrospective cohort study included women who had second and third trimester ultrasound examinations. Delivery and neonatal outcomes of pregnancies with decreased EFW of ≥ 30 percentiles in EFW between ultrasound examinations (decreased growth group) and those without such a decrease (control group) were compared. Deliveries with EFW or birthweight below the 10th percentile were excluded. RESULTS Among 1610 deliveries, 57 were in the decreased growth group and 1553 in the control group. Maternal characteristics did not differ between the groups except for higher rate of nulliparity in the decreased growth group. We found similar rates of Category II/III monitoring, cesarean deliveries due to non-reassuring fetal heart rate and adverse neonatal outcomes. Neonatal birthweight was lower in the decreased growth group as compared to controls. CONCLUSIONS This study did not find association between the group of appropriate for gestational age fetuses with decreased growth, with adverse outcomes.
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Affiliation(s)
- Michal Ovadia
- Department of Obstetrics and Gynecology, Meir Medical Center, Kfar Saba, Affiliated with School of Medicine, Tel Aviv University, 59 Tchernichovsky St, 44281, Kfar Saba, Israel
| | - Hadar Gluska
- Department of Obstetrics and Gynecology, Meir Medical Center, Kfar Saba, Affiliated with School of Medicine, Tel Aviv University, 59 Tchernichovsky St, 44281, Kfar Saba, Israel
| | - Gal Cohen
- Department of Obstetrics and Gynecology, Meir Medical Center, Kfar Saba, Affiliated with School of Medicine, Tel Aviv University, 59 Tchernichovsky St, 44281, Kfar Saba, Israel
| | - Hanoch Schreiber
- Department of Obstetrics and Gynecology, Meir Medical Center, Kfar Saba, Affiliated with School of Medicine, Tel Aviv University, 59 Tchernichovsky St, 44281, Kfar Saba, Israel
| | - Tal Biron-Shental
- Department of Obstetrics and Gynecology, Meir Medical Center, Kfar Saba, Affiliated with School of Medicine, Tel Aviv University, 59 Tchernichovsky St, 44281, Kfar Saba, Israel
| | - Michal Kovo
- Department of Obstetrics and Gynecology, Meir Medical Center, Kfar Saba, Affiliated with School of Medicine, Tel Aviv University, 59 Tchernichovsky St, 44281, Kfar Saba, Israel
| | - Gil Shechter-Maor
- Department of Obstetrics and Gynecology, Meir Medical Center, Kfar Saba, Affiliated with School of Medicine, Tel Aviv University, 59 Tchernichovsky St, 44281, Kfar Saba, Israel.
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Orzeł A, Strojny AA, Filipecka-Tyczka D, Baran A, Muzyka-Placzynska K, Mabiala E, Pajutrek-Dudek J, Scholz A. Fetal Growth Velocity-A Breakthrough in Intrauterine Growth Assessment? J Clin Med 2024; 13:3842. [PMID: 38999408 PMCID: PMC11242467 DOI: 10.3390/jcm13133842] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2024] [Revised: 06/13/2024] [Accepted: 06/24/2024] [Indexed: 07/14/2024] Open
Abstract
The pursuit of assessing fetal well-being in obstetrical practice remains a central tenet, propelling ongoing endeavors to explore innovative markers and diagnostic methodologies aimed at prognosing potential perinatal adversities. Deviations from standard patterns of intrauterine growth, whether exhibiting excessive or insufficient trajectories, stand as pivotal indices hinting at underlying pathophysiological processes or heightened concurrent medical conditions. Initiatives like the Delphi consensus and the INTERGROWTH-21st project strive to refine diagnostic criteria and establish international standards for fetal growth assessment. This article aims to present the current knowledge regarding the assessment of abnormal growth, including novel methods such as growth velocity. Integrating fetal growth velocity assessment into perinatal care protocols holds promise in enhancing diagnostic precision. Growth velocity, involving changes in fetal size over a given period, offers insights into distinguishing between constitutional and pathological growth abnormalities. Various methodologies and models have been proposed to evaluate growth velocity, with notable advancements in understanding fetal growth patterns across different trimesters. It is believed that accelerated and reduced growth velocity may be a sensible parameter in the detection of fetal growth restriction (FGR), small-for-gestational-age (SGA) fetuses, large-for-gestational-age (LGA) fetuses and macrosomic fetuses as well as appropriate-for-gestational age (AGA) fetuses that encounter problems with growth continuation. Recent studies found that changes in growth velocity reflect the risk of adverse perinatal outcomes (APOs). Future directions in fetal health research aim to elucidate the long-term consequences of abnormal fetal growth velocity on neurodevelopmental outcomes, highlighting the critical role of early assessment and intervention.
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Affiliation(s)
- Anna Orzeł
- 1st Department of Obstetrics and Gynecology, Centre of Postgraduate Medical Education, 02-097 Warsaw, Poland; (A.O.); (A.A.S.); (A.B.); (K.M.-P.); (E.M.); (J.P.-D.)
| | - Agnieszka Aleksandra Strojny
- 1st Department of Obstetrics and Gynecology, Centre of Postgraduate Medical Education, 02-097 Warsaw, Poland; (A.O.); (A.A.S.); (A.B.); (K.M.-P.); (E.M.); (J.P.-D.)
| | | | - Arkadiusz Baran
- 1st Department of Obstetrics and Gynecology, Centre of Postgraduate Medical Education, 02-097 Warsaw, Poland; (A.O.); (A.A.S.); (A.B.); (K.M.-P.); (E.M.); (J.P.-D.)
| | - Katarzyna Muzyka-Placzynska
- 1st Department of Obstetrics and Gynecology, Centre of Postgraduate Medical Education, 02-097 Warsaw, Poland; (A.O.); (A.A.S.); (A.B.); (K.M.-P.); (E.M.); (J.P.-D.)
| | - Ewelina Mabiala
- 1st Department of Obstetrics and Gynecology, Centre of Postgraduate Medical Education, 02-097 Warsaw, Poland; (A.O.); (A.A.S.); (A.B.); (K.M.-P.); (E.M.); (J.P.-D.)
| | - Justyna Pajutrek-Dudek
- 1st Department of Obstetrics and Gynecology, Centre of Postgraduate Medical Education, 02-097 Warsaw, Poland; (A.O.); (A.A.S.); (A.B.); (K.M.-P.); (E.M.); (J.P.-D.)
| | - Anna Scholz
- 1st Department of Obstetrics and Gynecology, Centre of Postgraduate Medical Education, 02-097 Warsaw, Poland; (A.O.); (A.A.S.); (A.B.); (K.M.-P.); (E.M.); (J.P.-D.)
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Villar J, Cavoretto PI, Barros FC, Romero R, Papageorghiou AT, Kennedy SH. Etiologically Based Functional Taxonomy of the Preterm Birth Syndrome. Clin Perinatol 2024; 51:475-495. [PMID: 38705653 DOI: 10.1016/j.clp.2024.02.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/07/2024]
Abstract
Preterm birth (PTB) is a complex syndrome traditionally defined by a single parameter, namely, gestational age at birth (ie, ˂37 weeks). This approach has limitations for clinical usefulness and may explain the lack of progress in identifying cause-specific effective interventions. The authors offer a framework for a functional taxonomy of PTB based on (1) conceptual principles established a priori; (2) known etiologic factors; (3) specific, prospectively identified obstetric and neonatal clinical phenotypes; and (4) postnatal follow-up of growth and development up to 2 years of age. This taxonomy includes maternal, placental, and fetal conditions routinely recorded in data collection systems.
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Affiliation(s)
- Jose Villar
- Nuffield Department of Women's & Reproductive Health, Oxford Maternal & Perinatal Health Institute, Green Templeton College, University of Oxford, Oxford OX3 9DU, UK.
| | - Paolo Ivo Cavoretto
- Department of Obstetrics and Gynaecology, Vita-Salute San Raffaele University and IRCCS San Raffaele Scientific Institute, Milan 20132, Italy
| | - Fernando C Barros
- Post-Graduate Program in Health in the Life Cycle, Catholic University of Pelotas, Rua Félix da Cunha, Pelotas, Rio Grande do Sul 96010-000, Brazil
| | - Roberto Romero
- Pregnancy Research Branch, Division of Obstetrics and Maternal-Fetal Medicine, Division of Intramural Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, United States Department of Health and Human Services, Bethesda, MD, USA; Department of Obstetrics and Gynecology, University of Michigan, L4001 Women's Hospital, 1500 East Medical Center Drive, Ann Arbor, MI 48109-0276, USA; Department of Epidemiology and Biostatistics, Michigan State University, East Lansing, MI, USA
| | - Aris T Papageorghiou
- Nuffield Department of Women's & Reproductive Health, Oxford Maternal & Perinatal Health Institute, Green Templeton College, University of Oxford, Oxford OX3 9DU, UK
| | - Stephen H Kennedy
- Nuffield Department of Women's & Reproductive Health, Oxford Maternal & Perinatal Health Institute, Green Templeton College, University of Oxford, Oxford OX3 9DU, UK
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Yang H, Miao H, Yin M, Wang Y, Zhao D, Yang M, Zou J, Zhang W, Zhang L, Liu C, Wang Y, Wang Z, Yu Y, Wei D. The difference in early trimester fetal growth between singletons after frozen embryo transfer and fresh embryo transfer. AJOG GLOBAL REPORTS 2024; 4:100334. [PMID: 38584796 PMCID: PMC10998200 DOI: 10.1016/j.xagr.2024.100334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/09/2024] Open
Abstract
BACKGROUND Frozen embryo transfer resulted in a higher birthweight and an increased risk of macrosomia than fresh embryo transfer. However, the mechanism was still unclear. When the impact of frozen embryo transfer on fetal growth began was unknown. Crown-rump length at 11-13 weeks had been regarded as a good indicator of fetal growth in the first trimester and had been used for gestational age calculation in women with uncertain last menstrual periods. OBJECTIVE To evaluate the association between frozen embryo transfer and early fetal growth, particularly the crown-rump length, then fresh embryo transfer. The secondary objective was to investigate the potential correlation between crown-rump length and birthweight. STUDY DESIGN This was a retrospective cohort study conducted at the Reproductive Medical Center of Shandong University. A total of 4949 patients who obtained singleton pregnancy after frozen embryo transfer and 1793 patients who got singleton pregnancy after fresh embryo transfer between January 1, 2017 and December 31, 2022 were included. The primary outcome was the crown-rump length measured via ultrasound at 11-13 weeks gestation. The secondary outcomes were perinatal outcomes, including birthweight and the risk of large for gestational age, small for gestational age, macrosomia, low birthweight, and premature delivery. Multivariable linear regression models were used to adjust for potential confounders of crown-rump length. RESULTS A total of 6742 live singleton births after frozen embryo transfer or fresh embryo transfer were included in this study. In the univariable analysis, the frozen embryo transfer group had a larger crown-rump length (5.75±0.53 cm vs 5.57±0.48 cm, P<.001) and an increased risk of larger-than-expected crown-rump length (13.5% vs11.2%, P=.013) than the fresh embryo transfer group. After adjusting for confounders in multivariable linear regression models, frozen embryo transfer was still associated with a larger crown-rump length (regression coefficient, 3.809 [95% confidence intervals, 3.621-3.997], P<.001). When subgrouped by fetal gender, the crown-rump length of the frozen embryo transfer group was larger than the fresh embryo transfer group in both male and female fetuses. In addition, the crown-rump length was consistently larger in the frozen embryo transfer group than the fresh embryo transfer group in subgroups of the peak estradiol levels. The comparisons among different crown-rump length groups showed that smaller-than-expected crown-rump length was associated with increased risks of small for gestational age (6.3% vs 3.0%, P<.001) and preterm delivery (9.6% vs 6.7%, P=.004) than normal crown-rump length. CONCLUSION Frozen embryo transfer was associated with a larger crown-rump length than fresh embryo transfer, suggesting that the effect of frozen embryo transfer on fetal growth may begin in the early trimester. Suboptimal fetal growth in the first trimester may be associated with low birthweight and premature delivery.
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Affiliation(s)
- Huiming Yang
- Center for Reproductive Medicine, Shandong University, Jinan, China (Drs H Yang, Miao, Yin, Yi Wang, Zhao, M Yang, Zou, W Zhang, L Zhang, Liu, Yu Wang, Z Wang, and Wei)
- Key Laboratory of Reproductive Endocrinology of Ministry of Education, Shandong University, Jinan, China (Drs H Yang, Miao, Yin, Yi Wang, Zhao, M Yang, Zou, W Zhang, L Zhang, Liu, Yu Wang, Z Wang, and Wei)
- Shandong Key Laboratory of Reproductive Medicine, Jinan, China (Drs H Yang, Miao, Yin, Yi Wang, Zhao, M Yang, Zou, W Zhang, L Zhang, Liu, Yu Wang, Z Wang, and Wei)
- Medical Integration and Practice Center, Shandong University, Jinan, China (Drs H Yang, Miao, Yin, Yi Wang, Zhao, M Yang, Zou, W Zhang, L Zhang, Liu, Yu Wang, and Wei)
| | - Haozhe Miao
- Center for Reproductive Medicine, Shandong University, Jinan, China (Drs H Yang, Miao, Yin, Yi Wang, Zhao, M Yang, Zou, W Zhang, L Zhang, Liu, Yu Wang, Z Wang, and Wei)
- Key Laboratory of Reproductive Endocrinology of Ministry of Education, Shandong University, Jinan, China (Drs H Yang, Miao, Yin, Yi Wang, Zhao, M Yang, Zou, W Zhang, L Zhang, Liu, Yu Wang, Z Wang, and Wei)
- Shandong Key Laboratory of Reproductive Medicine, Jinan, China (Drs H Yang, Miao, Yin, Yi Wang, Zhao, M Yang, Zou, W Zhang, L Zhang, Liu, Yu Wang, Z Wang, and Wei)
- Medical Integration and Practice Center, Shandong University, Jinan, China (Drs H Yang, Miao, Yin, Yi Wang, Zhao, M Yang, Zou, W Zhang, L Zhang, Liu, Yu Wang, and Wei)
| | - Mengfei Yin
- Center for Reproductive Medicine, Shandong University, Jinan, China (Drs H Yang, Miao, Yin, Yi Wang, Zhao, M Yang, Zou, W Zhang, L Zhang, Liu, Yu Wang, Z Wang, and Wei)
- Key Laboratory of Reproductive Endocrinology of Ministry of Education, Shandong University, Jinan, China (Drs H Yang, Miao, Yin, Yi Wang, Zhao, M Yang, Zou, W Zhang, L Zhang, Liu, Yu Wang, Z Wang, and Wei)
- Shandong Key Laboratory of Reproductive Medicine, Jinan, China (Drs H Yang, Miao, Yin, Yi Wang, Zhao, M Yang, Zou, W Zhang, L Zhang, Liu, Yu Wang, Z Wang, and Wei)
- Medical Integration and Practice Center, Shandong University, Jinan, China (Drs H Yang, Miao, Yin, Yi Wang, Zhao, M Yang, Zou, W Zhang, L Zhang, Liu, Yu Wang, and Wei)
| | - Yixuan Wang
- Center for Reproductive Medicine, Shandong University, Jinan, China (Drs H Yang, Miao, Yin, Yi Wang, Zhao, M Yang, Zou, W Zhang, L Zhang, Liu, Yu Wang, Z Wang, and Wei)
- Key Laboratory of Reproductive Endocrinology of Ministry of Education, Shandong University, Jinan, China (Drs H Yang, Miao, Yin, Yi Wang, Zhao, M Yang, Zou, W Zhang, L Zhang, Liu, Yu Wang, Z Wang, and Wei)
- Shandong Key Laboratory of Reproductive Medicine, Jinan, China (Drs H Yang, Miao, Yin, Yi Wang, Zhao, M Yang, Zou, W Zhang, L Zhang, Liu, Yu Wang, Z Wang, and Wei)
- Medical Integration and Practice Center, Shandong University, Jinan, China (Drs H Yang, Miao, Yin, Yi Wang, Zhao, M Yang, Zou, W Zhang, L Zhang, Liu, Yu Wang, and Wei)
| | - Dingying Zhao
- Center for Reproductive Medicine, Shandong University, Jinan, China (Drs H Yang, Miao, Yin, Yi Wang, Zhao, M Yang, Zou, W Zhang, L Zhang, Liu, Yu Wang, Z Wang, and Wei)
- Key Laboratory of Reproductive Endocrinology of Ministry of Education, Shandong University, Jinan, China (Drs H Yang, Miao, Yin, Yi Wang, Zhao, M Yang, Zou, W Zhang, L Zhang, Liu, Yu Wang, Z Wang, and Wei)
- Shandong Key Laboratory of Reproductive Medicine, Jinan, China (Drs H Yang, Miao, Yin, Yi Wang, Zhao, M Yang, Zou, W Zhang, L Zhang, Liu, Yu Wang, Z Wang, and Wei)
- Medical Integration and Practice Center, Shandong University, Jinan, China (Drs H Yang, Miao, Yin, Yi Wang, Zhao, M Yang, Zou, W Zhang, L Zhang, Liu, Yu Wang, and Wei)
| | - Min Yang
- Center for Reproductive Medicine, Shandong University, Jinan, China (Drs H Yang, Miao, Yin, Yi Wang, Zhao, M Yang, Zou, W Zhang, L Zhang, Liu, Yu Wang, Z Wang, and Wei)
- Key Laboratory of Reproductive Endocrinology of Ministry of Education, Shandong University, Jinan, China (Drs H Yang, Miao, Yin, Yi Wang, Zhao, M Yang, Zou, W Zhang, L Zhang, Liu, Yu Wang, Z Wang, and Wei)
- Shandong Key Laboratory of Reproductive Medicine, Jinan, China (Drs H Yang, Miao, Yin, Yi Wang, Zhao, M Yang, Zou, W Zhang, L Zhang, Liu, Yu Wang, Z Wang, and Wei)
- Medical Integration and Practice Center, Shandong University, Jinan, China (Drs H Yang, Miao, Yin, Yi Wang, Zhao, M Yang, Zou, W Zhang, L Zhang, Liu, Yu Wang, and Wei)
| | - Jialin Zou
- Center for Reproductive Medicine, Shandong University, Jinan, China (Drs H Yang, Miao, Yin, Yi Wang, Zhao, M Yang, Zou, W Zhang, L Zhang, Liu, Yu Wang, Z Wang, and Wei)
- Key Laboratory of Reproductive Endocrinology of Ministry of Education, Shandong University, Jinan, China (Drs H Yang, Miao, Yin, Yi Wang, Zhao, M Yang, Zou, W Zhang, L Zhang, Liu, Yu Wang, Z Wang, and Wei)
- Shandong Key Laboratory of Reproductive Medicine, Jinan, China (Drs H Yang, Miao, Yin, Yi Wang, Zhao, M Yang, Zou, W Zhang, L Zhang, Liu, Yu Wang, Z Wang, and Wei)
- Medical Integration and Practice Center, Shandong University, Jinan, China (Drs H Yang, Miao, Yin, Yi Wang, Zhao, M Yang, Zou, W Zhang, L Zhang, Liu, Yu Wang, and Wei)
| | - Wenwen Zhang
- Center for Reproductive Medicine, Shandong University, Jinan, China (Drs H Yang, Miao, Yin, Yi Wang, Zhao, M Yang, Zou, W Zhang, L Zhang, Liu, Yu Wang, Z Wang, and Wei)
- Key Laboratory of Reproductive Endocrinology of Ministry of Education, Shandong University, Jinan, China (Drs H Yang, Miao, Yin, Yi Wang, Zhao, M Yang, Zou, W Zhang, L Zhang, Liu, Yu Wang, Z Wang, and Wei)
- Shandong Key Laboratory of Reproductive Medicine, Jinan, China (Drs H Yang, Miao, Yin, Yi Wang, Zhao, M Yang, Zou, W Zhang, L Zhang, Liu, Yu Wang, Z Wang, and Wei)
- Medical Integration and Practice Center, Shandong University, Jinan, China (Drs H Yang, Miao, Yin, Yi Wang, Zhao, M Yang, Zou, W Zhang, L Zhang, Liu, Yu Wang, and Wei)
| | - Lingling Zhang
- Center for Reproductive Medicine, Shandong University, Jinan, China (Drs H Yang, Miao, Yin, Yi Wang, Zhao, M Yang, Zou, W Zhang, L Zhang, Liu, Yu Wang, Z Wang, and Wei)
- Key Laboratory of Reproductive Endocrinology of Ministry of Education, Shandong University, Jinan, China (Drs H Yang, Miao, Yin, Yi Wang, Zhao, M Yang, Zou, W Zhang, L Zhang, Liu, Yu Wang, Z Wang, and Wei)
- Shandong Key Laboratory of Reproductive Medicine, Jinan, China (Drs H Yang, Miao, Yin, Yi Wang, Zhao, M Yang, Zou, W Zhang, L Zhang, Liu, Yu Wang, Z Wang, and Wei)
- Medical Integration and Practice Center, Shandong University, Jinan, China (Drs H Yang, Miao, Yin, Yi Wang, Zhao, M Yang, Zou, W Zhang, L Zhang, Liu, Yu Wang, and Wei)
| | - Chendan Liu
- Center for Reproductive Medicine, Shandong University, Jinan, China (Drs H Yang, Miao, Yin, Yi Wang, Zhao, M Yang, Zou, W Zhang, L Zhang, Liu, Yu Wang, Z Wang, and Wei)
- Key Laboratory of Reproductive Endocrinology of Ministry of Education, Shandong University, Jinan, China (Drs H Yang, Miao, Yin, Yi Wang, Zhao, M Yang, Zou, W Zhang, L Zhang, Liu, Yu Wang, Z Wang, and Wei)
- Shandong Key Laboratory of Reproductive Medicine, Jinan, China (Drs H Yang, Miao, Yin, Yi Wang, Zhao, M Yang, Zou, W Zhang, L Zhang, Liu, Yu Wang, Z Wang, and Wei)
- Medical Integration and Practice Center, Shandong University, Jinan, China (Drs H Yang, Miao, Yin, Yi Wang, Zhao, M Yang, Zou, W Zhang, L Zhang, Liu, Yu Wang, and Wei)
| | - Yue Wang
- Center for Reproductive Medicine, Shandong University, Jinan, China (Drs H Yang, Miao, Yin, Yi Wang, Zhao, M Yang, Zou, W Zhang, L Zhang, Liu, Yu Wang, Z Wang, and Wei)
- Key Laboratory of Reproductive Endocrinology of Ministry of Education, Shandong University, Jinan, China (Drs H Yang, Miao, Yin, Yi Wang, Zhao, M Yang, Zou, W Zhang, L Zhang, Liu, Yu Wang, Z Wang, and Wei)
- Shandong Key Laboratory of Reproductive Medicine, Jinan, China (Drs H Yang, Miao, Yin, Yi Wang, Zhao, M Yang, Zou, W Zhang, L Zhang, Liu, Yu Wang, Z Wang, and Wei)
- Medical Integration and Practice Center, Shandong University, Jinan, China (Drs H Yang, Miao, Yin, Yi Wang, Zhao, M Yang, Zou, W Zhang, L Zhang, Liu, Yu Wang, and Wei)
| | - Ze Wang
- Center for Reproductive Medicine, Shandong University, Jinan, China (Drs H Yang, Miao, Yin, Yi Wang, Zhao, M Yang, Zou, W Zhang, L Zhang, Liu, Yu Wang, Z Wang, and Wei)
- Key Laboratory of Reproductive Endocrinology of Ministry of Education, Shandong University, Jinan, China (Drs H Yang, Miao, Yin, Yi Wang, Zhao, M Yang, Zou, W Zhang, L Zhang, Liu, Yu Wang, Z Wang, and Wei)
- Shandong Key Laboratory of Reproductive Medicine, Jinan, China (Drs H Yang, Miao, Yin, Yi Wang, Zhao, M Yang, Zou, W Zhang, L Zhang, Liu, Yu Wang, Z Wang, and Wei)
| | - Yunhai Yu
- Department of Obstetrics and Gynecology, Second Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China (Dr Yu)
| | - Daimin Wei
- Center for Reproductive Medicine, Shandong University, Jinan, China (Drs H Yang, Miao, Yin, Yi Wang, Zhao, M Yang, Zou, W Zhang, L Zhang, Liu, Yu Wang, Z Wang, and Wei)
- Key Laboratory of Reproductive Endocrinology of Ministry of Education, Shandong University, Jinan, China (Drs H Yang, Miao, Yin, Yi Wang, Zhao, M Yang, Zou, W Zhang, L Zhang, Liu, Yu Wang, Z Wang, and Wei)
- Shandong Key Laboratory of Reproductive Medicine, Jinan, China (Drs H Yang, Miao, Yin, Yi Wang, Zhao, M Yang, Zou, W Zhang, L Zhang, Liu, Yu Wang, Z Wang, and Wei)
- Medical Integration and Practice Center, Shandong University, Jinan, China (Drs H Yang, Miao, Yin, Yi Wang, Zhao, M Yang, Zou, W Zhang, L Zhang, Liu, Yu Wang, and Wei)
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Caradeux J, Martínez-Portilla RJ, Martínez-Egea J, Ávila F, Figueras F. Routine third-trimester ultrasound assessment for intrauterine growth restriction. Am J Obstet Gynecol MFM 2024; 6:101294. [PMID: 38281581 DOI: 10.1016/j.ajogmf.2024.101294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Revised: 01/02/2024] [Accepted: 01/03/2024] [Indexed: 01/30/2024]
Abstract
Intrauterine growth restriction significantly impacts perinatal outcomes. Undetected IUGR escalates the risk of adverse outcomes. Serial symphysis-fundal height measurement, a recommended strategy, is insufficient in detecting abnormal fetal growth. Routine third-trimester ultrasounds significantly improve detection rates compared with this approach, but direct high-quality evidence supporting enhanced perinatal outcomes from routine scanning is lacking. In assessing fetal growth, abdominal circumference alone performs comparably to estimated fetal weight. Hadlock formulas demonstrate accurate fetal weight estimation across diverse gestational ages and settings. When choosing growth charts, prescriptive standards (encompassing healthy pregnancies) should be prioritized over descriptive ones. Customized fetal standards may enhance antenatal IUGR detection, but conclusive high-quality evidence is elusive. Emerging observational data suggest that longitudinal fetal growth assessment could predict adverse outcomes better. However, direct randomized trial evidence supporting this remains insufficient.
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Affiliation(s)
- Javier Caradeux
- Maternal and Fetal Medicine Unit, Department of Obstetrics and Gynecology, Clínica Santa María, Santiago, Chile (Drs Caradeux and Ávila)
| | - Raigam J Martínez-Portilla
- Clinical Research Branch, Evidence-Based Medicine Department, National Institute of Perinatology, Mexico City, Mexico (Dr Martínez-Portilla)
| | - Judit Martínez-Egea
- BCNatal Fetal Medicine Research Center, Barcelona Center for Maternal-Fetal and Neonatal Medicine (Hospital Clínic and Hospital Sant Joan de Deu), Instituto Clínic de Ginecología, Obstetricia i Neonatología, Universitat de Barcelona, Barcelona, Spain (Drs Martínez-Egea and Figueras)
| | - Francisco Ávila
- Maternal and Fetal Medicine Unit, Department of Obstetrics and Gynecology, Clínica Santa María, Santiago, Chile (Drs Caradeux and Ávila)
| | - Francesc Figueras
- BCNatal Fetal Medicine Research Center, Barcelona Center for Maternal-Fetal and Neonatal Medicine (Hospital Clínic and Hospital Sant Joan de Deu), Instituto Clínic de Ginecología, Obstetricia i Neonatología, Universitat de Barcelona, Barcelona, Spain (Drs Martínez-Egea and Figueras).
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6
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Gardosi J, Hugh O. Outcome-based comparative analysis of five fetal growth velocity models to define slow growth. ULTRASOUND IN OBSTETRICS & GYNECOLOGY : THE OFFICIAL JOURNAL OF THE INTERNATIONAL SOCIETY OF ULTRASOUND IN OBSTETRICS AND GYNECOLOGY 2023; 62:805-812. [PMID: 37191400 DOI: 10.1002/uog.26248] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Revised: 03/28/2023] [Accepted: 05/02/2023] [Indexed: 05/17/2023]
Abstract
OBJECTIVE Fetal growth surveillance includes assessment of size as well as rate of growth, and various definitions for slow growth have been adopted into clinical use. The aim of this study was to evaluate the effectiveness of different models to identify stillbirth risk, in addition to risk represented by the fetus being small-for-gestational age (SGA). METHODS This was a retrospective analysis of a routinely collected and anonymized dataset of pregnancies that had two or more third-trimester ultrasound measurements of estimated fetal weight (EFW). SGA was defined as EFW < 10th customized centile, and slow growth was defined according to five published models in clinical use: (1) a fixed velocity limit of 20 g per day (FVL20 ); (2) a fixed > 50 centile drop, regardless of scan-measurement interval (FCD50 ); (3) a fixed > 30 centile drop, regardless of scan interval (FCD30 ); (4) growth trajectory slower than the third customized growth-centile limit (GCL3 ); and (5) EFW at second scan below the projected optimal weight range (POWR), based on partial receiver-operating-characteristics-curve-derived cut-offs specific to the scan interval. RESULTS The study cohort consisted of 164 718 pregnancies with 480 592 third-trimester ultrasound scans (mean ± SD, 2.9 ± 0.9). The last two scans in each pregnancy were performed at an average gestational age of 33 + 5 and 37 + 1 weeks. At the last scan, 12 858 (7.8%) EFWs were SGA, and of these, 9359 were also SGA at birth (positive predictive value, 72.8%). The rate at which slow growth was defined varied considerably (FVL20 , 12.7%; FCD50 , 0.7%; FCD30 , 4.6%; GCL3 , 19.8%; POWR, 10.1%), and there was varying overlap between cases identified as having slow growth and those identified as SGA at the last scan. Only the POWR method identified additional non-SGA pregnancies with slow growth (11 237/16 671 (67.4%)) that had significant stillbirth risk (relative risk, 1.58 (95% CI, 1.04-2.39)). These non-SGA cases resulting in stillbirth had a median EFW centile of 52.6 at the last scan and a median weight centile of 27.3 at birth. Subgroup analysis identified methodological problems with the fixed-velocity model because it assumes linear growth throughout gestation, and with the centile-based methods because the non-parametric distribution of centiles at the extremes does not reflect actual difference in weight gain. CONCLUSION Comparative analysis of five clinically used methods to define slow fetal growth has shown that only the measurement-interval-specific POWR model can identify non-SGA fetuses with slow growth that are at increased risk of stillbirth. © 2023 The Authors. Ultrasound in Obstetrics & Gynecology published by John Wiley & Sons Ltd on behalf of International Society of Ultrasound in Obstetrics and Gynecology.
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Affiliation(s)
| | - O Hugh
- Perinatal Institute, Birmingham, UK
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Jiang J, Zhu X, Zhou L, Yin S, Feng W, Jiang T. Conditional standards for the quantification of foetal growth in an ethnic Chinese population: a longitudinal study. J OBSTET GYNAECOL 2022; 42:2992-2998. [PMID: 36178449 DOI: 10.1080/01443615.2022.2125290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
This was an observational study of low-risk singleton pregnancies in an ethnic Chinese population. Foetal biometric variables which included biparietal diameter (BPD), head circumference (HC), abdominal circumference (AC) and femur length (FL) were measured repeatedly. The standard views for measurement were obtained according to INTERGROWTH-21st criteria. A linear mixed model with fractional polynomial regression was used to describe the longitudinal design. The study included 1289 foetuses and a total of 5125 ultrasound scans, of which each foetus was scanned at least three times, the intervals between scans being at least two weeks. The parameters of the linear mixed models were estimated by Stata v.16 (College Station, TX). Using these parameters, the equations of the mean and variance for BPD, HC, AC and FL were constructed. The conditional percentiles or Z scores could be calculated based on the above equations and previous measurements of the same foetus. A spreadsheet was provided for implementation.Impact StatementWhat is already known on this subject? Longitudinal data derived from serial measurements are therefore appropriate for assessing both foetal size and foetal growth. At present, most reference charts of ethnic Chinese foetal biometry are derived from cross-sectional data, which can only assess foetal size.What do the results of this study add? In this study, we have constructed conditional standards for foetal biometry in an ethnic Chinese population and provided a spreadsheet for querying.What are the implications of these findings for clinical practice and/or further research? The conditional standards can be used to assess foetal growth in clinical practice. In the future, we hope that these foetal growth standards can be applied to determine whether abnormal growth increases the risk of adverse outcomes.
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Affiliation(s)
- Jian Jiang
- Department of Ultrasound Medicine, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Xiaodan Zhu
- Department of Ultrasound Medicine, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Linyu Zhou
- Department of Ultrasound Medicine, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Shanyu Yin
- Department of Ultrasound Medicine, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Weilian Feng
- Department of Ultrasound Medicine, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Tian'an Jiang
- Department of Ultrasound Medicine, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China.,Zhejiang Provincial Key Laboratory of Pulsed Electric Field Technology for Medical Transformation, Hangzhou, China
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Pacora P, Romero R, Jung E, Gudicha DW, Hernandez-Andrade E, Musilova I, Kacerovsky M, Jaiman S, Erez O, Hsu CD, Tarca AL. Reduced fetal growth velocity precedes antepartum fetal death. ULTRASOUND IN OBSTETRICS & GYNECOLOGY : THE OFFICIAL JOURNAL OF THE INTERNATIONAL SOCIETY OF ULTRASOUND IN OBSTETRICS AND GYNECOLOGY 2021; 57:942-952. [PMID: 32936481 PMCID: PMC9651138 DOI: 10.1002/uog.23111] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Revised: 08/24/2020] [Accepted: 08/26/2020] [Indexed: 05/25/2023]
Abstract
OBJECTIVES To determine whether decreased fetal growth velocity precedes antepartum fetal death and to evaluate whether fetal growth velocity is a better predictor of antepartum fetal death compared to a single fetal biometric measurement at the last available ultrasound scan prior to diagnosis of demise. METHODS This was a retrospective, longitudinal study of 4285 singleton pregnancies in African-American women who underwent at least two fetal ultrasound examinations between 14 and 32 weeks of gestation and delivered a liveborn neonate (controls; n = 4262) or experienced antepartum fetal death (cases; n = 23). Fetal death was defined as death diagnosed at ≥ 20 weeks of gestation and confirmed by ultrasound examination. Exclusion criteria included congenital anomaly, birth at < 20 weeks of gestation, multiple gestation and intrapartum fetal death. The ultrasound examination performed at the time of fetal demise was not included in the analysis. Percentiles for estimated fetal weight (EFW) and individual biometric parameters were determined according to the Hadlock and Perinatology Research Branch/Eunice Kennedy Shriver National Institute of Child Health and Human Development (PRB/NICHD) fetal growth standards. Fetal growth velocity was defined as the slope of the regression line of the measurement percentiles as a function of gestational age based on two or more measurements in each pregnancy. RESULTS Cases had significantly lower growth velocities of EFW (P < 0.001) and of fetal head circumference, biparietal diameter, abdominal circumference and femur length (all P < 0.05) compared to controls, according to the PRB/NICHD and Hadlock growth standards. Fetuses with EFW growth velocity < 10th percentile of the controls had a 9.4-fold and an 11.2-fold increased risk of antepartum death, based on the Hadlock and customized PRB/NICHD standards, respectively. At a 10% false-positive rate, the sensitivity of EFW growth velocity for predicting antepartum fetal death was 56.5%, compared to 26.1% for a single EFW percentile evaluation at the last available ultrasound examination, according to the customized PRB/NICHD standard. CONCLUSIONS Given that 74% of antepartum fetal death cases were not diagnosed as small-for-gestational age (EFW < 10th percentile) at the last ultrasound examination when the fetuses were alive, alternative approaches are needed to improve detection of fetuses at risk of fetal death. Longitudinal sonographic evaluation to determine growth velocity doubles the sensitivity for prediction of antepartum fetal death compared to a single EFW measurement at the last available ultrasound examination, yet the performance is still suboptimal. © 2020 International Society of Ultrasound in Obstetrics and Gynecology.
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Affiliation(s)
- Percy Pacora
- Perinatology Research Branch, Division of Obstetrics and Maternal-Fetal Medicine, Division of Intramural Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, U.S. Department of Health and Human Services (NICHD/NIH/DHHS), Bethesda, Maryland, and Detroit, Michigan, USA
- Department of Obstetrics and Gynecology, Wayne State University School of Medicine, Detroit, Michigan, USA
| | - Roberto Romero
- Perinatology Research Branch, Division of Obstetrics and Maternal-Fetal Medicine, Division of Intramural Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, U.S. Department of Health and Human Services (NICHD/NIH/DHHS), Bethesda, Maryland, and Detroit, Michigan, USA
- Department of Obstetrics and Gynecology, University of Michigan, Ann Arbor, Michigan, USA
- Department of Epidemiology and Biostatistics, Michigan State University, East Lansing, Michigan, USA
- Center for Molecular Medicine and Genetics, Wayne State University, Detroit, Michigan, USA
- Detroit Medical Center, Detroit, Michigan, USA
- Department of Obstetrics and Gynecology, Florida International University, Miami, Florida, USA
| | - Eunjung Jung
- Perinatology Research Branch, Division of Obstetrics and Maternal-Fetal Medicine, Division of Intramural Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, U.S. Department of Health and Human Services (NICHD/NIH/DHHS), Bethesda, Maryland, and Detroit, Michigan, USA
- Department of Obstetrics and Gynecology, Wayne State University School of Medicine, Detroit, Michigan, USA
| | - Dereje W. Gudicha
- Perinatology Research Branch, Division of Obstetrics and Maternal-Fetal Medicine, Division of Intramural Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, U.S. Department of Health and Human Services (NICHD/NIH/DHHS), Bethesda, Maryland, and Detroit, Michigan, USA
- Department of Obstetrics and Gynecology, Wayne State University School of Medicine, Detroit, Michigan, USA
| | - Edgar Hernandez-Andrade
- Perinatology Research Branch, Division of Obstetrics and Maternal-Fetal Medicine, Division of Intramural Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, U.S. Department of Health and Human Services (NICHD/NIH/DHHS), Bethesda, Maryland, and Detroit, Michigan, USA
- Department of Obstetrics and Gynecology, Wayne State University School of Medicine, Detroit, Michigan, USA
| | - Ivana Musilova
- Perinatology Research Branch, Division of Obstetrics and Maternal-Fetal Medicine, Division of Intramural Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, U.S. Department of Health and Human Services (NICHD/NIH/DHHS), Bethesda, Maryland, and Detroit, Michigan, USA
- Department of Obstetrics and Gynecology, Wayne State University School of Medicine, Detroit, Michigan, USA
| | - Marian Kacerovsky
- Perinatology Research Branch, Division of Obstetrics and Maternal-Fetal Medicine, Division of Intramural Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, U.S. Department of Health and Human Services (NICHD/NIH/DHHS), Bethesda, Maryland, and Detroit, Michigan, USA
- Department of Obstetrics and Gynecology, Wayne State University School of Medicine, Detroit, Michigan, USA
| | - Sunil Jaiman
- Perinatology Research Branch, Division of Obstetrics and Maternal-Fetal Medicine, Division of Intramural Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, U.S. Department of Health and Human Services (NICHD/NIH/DHHS), Bethesda, Maryland, and Detroit, Michigan, USA
- Department of Obstetrics and Gynecology, Wayne State University School of Medicine, Detroit, Michigan, USA
| | - Offer Erez
- Perinatology Research Branch, Division of Obstetrics and Maternal-Fetal Medicine, Division of Intramural Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, U.S. Department of Health and Human Services (NICHD/NIH/DHHS), Bethesda, Maryland, and Detroit, Michigan, USA
- Department of Obstetrics and Gynecology, Wayne State University School of Medicine, Detroit, Michigan, USA
| | - Chaur-Dong Hsu
- Perinatology Research Branch, Division of Obstetrics and Maternal-Fetal Medicine, Division of Intramural Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, U.S. Department of Health and Human Services (NICHD/NIH/DHHS), Bethesda, Maryland, and Detroit, Michigan, USA
- Department of Obstetrics and Gynecology, Wayne State University School of Medicine, Detroit, Michigan, USA
- Department of Physiology, Wayne State University School of Medicine, Detroit, MI, USA
| | - Adi L. Tarca
- Perinatology Research Branch, Division of Obstetrics and Maternal-Fetal Medicine, Division of Intramural Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, U.S. Department of Health and Human Services (NICHD/NIH/DHHS), Bethesda, Maryland, and Detroit, Michigan, USA
- Department of Obstetrics and Gynecology, Wayne State University School of Medicine, Detroit, Michigan, USA
- Department of Computer Science, Wayne State University College of Engineering, Detroit, Michigan, USA
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Kabiri D, Romero R, Gudicha DW, Hernandez-Andrade E, Pacora P, Benshalom-Tirosh N, Tirosh D, Yeo L, Erez O, Hassan SS, Tarca AL. Prediction of adverse perinatal outcome by fetal biometry: comparison of customized and population-based standards. ULTRASOUND IN OBSTETRICS & GYNECOLOGY : THE OFFICIAL JOURNAL OF THE INTERNATIONAL SOCIETY OF ULTRASOUND IN OBSTETRICS AND GYNECOLOGY 2020; 55:177-188. [PMID: 31006913 PMCID: PMC6810752 DOI: 10.1002/uog.20299] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Revised: 04/09/2019] [Accepted: 04/12/2019] [Indexed: 05/15/2023]
Abstract
OBJECTIVE To compare the predictive performance of estimated fetal weight (EFW) percentiles, according to eight growth standards, to detect fetuses at risk for adverse perinatal outcome. METHODS This was a retrospective cohort study of 3437 African-American women. Population-based (Hadlock, INTERGROWTH-21st , World Health Organization (WHO), Fetal Medicine Foundation (FMF)), ethnicity-specific (Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)), customized (Gestation-Related Optimal Weight (GROW)) and African-American customized (Perinatology Research Branch (PRB)/NICHD) growth standards were used to calculate EFW percentiles from the last available scan prior to delivery. Prediction performance indices and relative risk (RR) were calculated for EFW < 10th and > 90th percentiles, according to each standard, for individual and composite adverse perinatal outcomes. Sensitivity at a fixed (10%) false-positive rate (FPR) and partial (FPR < 10%) and full areas under the receiver-operating-characteristics curves (AUC) were compared between the standards. RESULTS Ten percent (341/3437) of neonates were classified as small-for-gestational age (SGA) at birth, and of these 16.4% (56/341) had at least one adverse perinatal outcome. SGA neonates had a 1.5-fold increased risk of any adverse perinatal outcome (P < 0.05). The screen-positive rate of EFW < 10th percentile varied from 6.8% (NICHD) to 24.4% (FMF). EFW < 10th percentile, according to all standards, was associated with an increased risk for each of the adverse perinatal outcomes considered (P < 0.05 for all). The highest RRs associated with EFW < 10th percentile for each adverse outcome were 5.1 (95% CI, 2.1-12.3) for perinatal mortality (WHO); 5.0 (95% CI, 3.2-7.8) for perinatal hypoglycemia (NICHD); 3.4 (95% CI, 2.4-4.7) for mechanical ventilation (NICHD); 2.9 (95% CI, 1.8-4.6) for 5-min Apgar score < 7 (GROW); 2.7 (95% CI, 2.0-3.6) for neonatal intensive care unit (NICU) admission (NICHD); and 2.5 (95% CI, 1.9-3.1) for composite adverse perinatal outcome (NICHD). Although the RR CIs overlapped among all standards for each individual outcome, the RR of composite adverse perinatal outcome in pregnancies with EFW < 10th percentile was higher according to the NICHD (2.46; 95% CI, 1.9-3.1) than the FMF (1.47; 95% CI, 1.2-1.8) standard. The sensitivity for composite adverse perinatal outcome varied substantially between standards, ranging from 15% for NICHD to 32% for FMF, due mostly to differences in FPR; this variation subsided when the FPR was set to the same value (10%). Analysis of AUC revealed significantly better performance for the prediction of perinatal mortality by the PRB/NICHD standard (AUC = 0.70) compared with the Hadlock (AUC = 0.66) and FMF (AUC = 0.64) standards. Evaluation of partial AUC (FPR < 10%) demonstrated that the INTERGROWTH-21st standard performed better than the Hadlock standard for the prediction of NICU admission and mechanical ventilation (P < 0.05 for both). Although fetuses with EFW > 90th percentile were also at risk for any adverse perinatal outcome according to the INTERGROWTH-21st (RR = 1.4; 95% CI, 1.0-1.9) and Hadlock (RR = 1.7; 95% CI, 1.1-2.6) standards, many times fewer cases (2-5-fold lower sensitivity) were detected by using EFW > 90th percentile, rather than EFW < 10th percentile, in screening by these standards. CONCLUSIONS Fetuses with EFW < 10th percentile or EFW > 90th percentile were at increased risk of adverse perinatal outcomes according to all or some of the eight growth standards, respectively. The RR of a composite adverse perinatal outcome in pregnancies with EFW < 10th percentile was higher for the most-stringent (NICHD) compared with the least-stringent (FMF) standard. The results of the complementary analysis of AUC suggest slightly improved detection of adverse perinatal outcome by more recent population-based (INTERGROWTH-21st ) and customized (PRB/NICHD) standards compared with the Hadlock and FMF standards. Published 2019. This article is a U.S. Government work and is in the public domain in the USA.
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Affiliation(s)
- Doron Kabiri
- Perinatology Research Branch, Division of Obstetrics and Maternal-Fetal Medicine, Division of Intramural Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, U.S. Department of Health and Human Services (NICHD/NIH/DHHS)
- Department of Obstetrics and Gynecology, Wayne State University School of Medicine, Detroit, MI
- Department of Obstetrics and Gynecology, Hadassah-Hebrew University Medical Center, Jerusalem, Israel
| | - Roberto Romero
- Perinatology Research Branch, Division of Obstetrics and Maternal-Fetal Medicine, Division of Intramural Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, U.S. Department of Health and Human Services (NICHD/NIH/DHHS)
- Department of Obstetrics and Gynecology, University of Michigan, Ann Arbor, MI
- Department of Epidemiology and Biostatistics, Michigan State University, East Lansing, MI
- Center for Molecular Medicine and Genetics, Wayne State University, Detroit, MI
- Corresponding authors: Roberto Romero, MD, D.Med.Sci., Perinatology Research Branch, NICHD/NIH/DHHS, Hutzel Women’s Hospital, 3990 John R Street, 4 Brush, Detroit, Michigan 48201; telephone: (313) 993-2700; fax: (313) 577-6294; . Adi L. Tarca, PhD, Perinatology Research Branch, NICHD/NIH/DHHS, Hutzel Women’s Hospital, 3990 John R Street, 4 Brush, Detroit, Michigan 48201; telephone: (313) 577-5305; fax: (313) 577-6294;
| | - Dereje W. Gudicha
- Perinatology Research Branch, Division of Obstetrics and Maternal-Fetal Medicine, Division of Intramural Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, U.S. Department of Health and Human Services (NICHD/NIH/DHHS)
| | - Edgar Hernandez-Andrade
- Perinatology Research Branch, Division of Obstetrics and Maternal-Fetal Medicine, Division of Intramural Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, U.S. Department of Health and Human Services (NICHD/NIH/DHHS)
- Department of Obstetrics and Gynecology, Wayne State University School of Medicine, Detroit, MI
| | - Percy Pacora
- Perinatology Research Branch, Division of Obstetrics and Maternal-Fetal Medicine, Division of Intramural Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, U.S. Department of Health and Human Services (NICHD/NIH/DHHS)
- Department of Obstetrics and Gynecology, Wayne State University School of Medicine, Detroit, MI
| | - Neta Benshalom-Tirosh
- Perinatology Research Branch, Division of Obstetrics and Maternal-Fetal Medicine, Division of Intramural Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, U.S. Department of Health and Human Services (NICHD/NIH/DHHS)
- Department of Obstetrics and Gynecology, Wayne State University School of Medicine, Detroit, MI
| | - Dan Tirosh
- Perinatology Research Branch, Division of Obstetrics and Maternal-Fetal Medicine, Division of Intramural Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, U.S. Department of Health and Human Services (NICHD/NIH/DHHS)
- Department of Obstetrics and Gynecology, Wayne State University School of Medicine, Detroit, MI
| | - Lami Yeo
- Perinatology Research Branch, Division of Obstetrics and Maternal-Fetal Medicine, Division of Intramural Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, U.S. Department of Health and Human Services (NICHD/NIH/DHHS)
- Department of Obstetrics and Gynecology, Wayne State University School of Medicine, Detroit, MI
| | - Offer Erez
- Perinatology Research Branch, Division of Obstetrics and Maternal-Fetal Medicine, Division of Intramural Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, U.S. Department of Health and Human Services (NICHD/NIH/DHHS)
- Department of Obstetrics and Gynecology, Wayne State University School of Medicine, Detroit, MI
- Maternity Department “D”, Division of Obstetrics and Gynecology, Soroka University Medical Center, School of Medicine, faculty of Health Sciences, Ben Gurion University of the Negev, Beer-Sheva, Israel
| | - Sonia S. Hassan
- Perinatology Research Branch, Division of Obstetrics and Maternal-Fetal Medicine, Division of Intramural Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, U.S. Department of Health and Human Services (NICHD/NIH/DHHS)
- Department of Obstetrics and Gynecology, Wayne State University School of Medicine, Detroit, MI
- Department of Physiology, Wayne State University School of Medicine, Detroit, MI
| | - Adi L. Tarca
- Perinatology Research Branch, Division of Obstetrics and Maternal-Fetal Medicine, Division of Intramural Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, U.S. Department of Health and Human Services (NICHD/NIH/DHHS)
- Department of Obstetrics and Gynecology, Wayne State University School of Medicine, Detroit, MI
- Department of Computer Science, Wayne State University College of Engineering, Detroit, MI
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Lund N, Sandager P, Leonhard AK, Vogel I, Petersen OB. Second-trimester fetal head circumference in more than 350 000 pregnancies: Outcome and suggestion for sex-dependent cutoffs for small heads. Prenat Diagn 2019; 39:910-920. [PMID: 31218719 DOI: 10.1002/pd.5504] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Revised: 05/28/2019] [Accepted: 06/08/2019] [Indexed: 01/28/2023]
Abstract
OBJECTIVE To explore the relationship between small fetal second-trimester head circumference (HC) and pregnancy outcome and identify a cutoff point for offering genetic testing. METHOD Data from second-trimester scans in Denmark were linked to national registers. Fetuses with anomalies diagnosed before this scan were excluded. Fetuses were grouped according to HC z-score. RESULTS We included 352 515 singleton fetuses. The mean HC was significantly larger among males than among females with z-scores averaging 0.52 more in males. Small HC was associated with chromosomal anomaly, malformations of the CNS and heart, miscarriage/perinatal death, termination, preterm delivery, and intrauterine growth restriction (test for trend: P < .001 for all outcomes). Fetuses in the group with z-score less than -3 had the highest incidence of adverse outcome, irrespective of fetal sex. In the groups with z-scores between -3 and -2.5, and between -2.5 and -2, risk of adverse outcome was lower for females than males for all outcome categories. CONCLUSION Small HC in second trimester is a prognostic marker for adverse outcome. The smaller the HC, the higher the risk of adverse outcome. We suggest an HC cutoff point of -2 SD for males and -2.5 SD for females for offering genetic testing.
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Affiliation(s)
- Najaaraq Lund
- Center for Fetal Diagnostics, Aarhus University Hospital, Aarhus, Denmark
- Department of Obstetrics and Gynecology, Aarhus University Hospital, Aarhus, Denmark
| | - Puk Sandager
- Center for Fetal Diagnostics, Aarhus University Hospital, Aarhus, Denmark
- Department of Obstetrics and Gynecology, Aarhus University Hospital, Aarhus, Denmark
| | | | - Ida Vogel
- Center for Fetal Diagnostics, Aarhus University Hospital, Aarhus, Denmark
- Department of Clinical Genetics, Aarhus University Hospital, Aarhus, Denmark
| | - Olav Bjørn Petersen
- Center for Fetal Diagnostics, Aarhus University Hospital, Aarhus, Denmark
- Department of Obstetrics and Gynecology, Aarhus University Hospital, Aarhus, Denmark
- Department of Clinical Medicine, Aarhus University, Aarhus, Denmark
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Lappas M, McCracken S, McKelvey K, Lim R, James J, Roberts CT, Fournier T, Alfaidy N, Powell KL, Borg AJ, Morris JM, Leaw B, Singh H, Ebeling PR, Wallace EM, Parry LJ, Dimitriadis E, Murthi P. Formyl peptide receptor-2 is decreased in foetal growth restriction and contributes to placental dysfunction. Mol Hum Reprod 2019; 24:94-109. [PMID: 29272530 DOI: 10.1093/molehr/gax067] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2017] [Accepted: 12/18/2017] [Indexed: 01/07/2023] Open
Abstract
STUDY QUESTION What is the association between placental formyl peptide receptor 2 (FPR2) and trophoblast and endothelial functions in pregnancies affected by foetal growth restriction (FGR)? SUMMARY ANSWER Reduced FPR2 placental expression in idiopathic FGR results in significantly altered trophoblast differentiation and endothelial function in vitro. WHAT IS KNOWN ALREADY FGR is associated with placental insufficiency, where defective trophoblast and endothelial functions contribute to reduced feto-placental growth. STUDY DESIGN, SIZE, DURATION The expression of FPR2 in placental tissues from human pregnancies complicated with FGR was compared to that in gestation-matched uncomplicated control pregnancies (n = 25 from each group). Fpr2 expression was also determined in placental tissues obtained from a murine model of FGR (n = 4). The functional role of FPR2 in primary trophoblasts and endothelial cells in vitro was assessed in diverse assays in a time-dependent manner. PARTICIPANTS/MATERIALS, SETTING, METHODS Placentae from third-trimester pregnancies complicated by idiopathic FGR (n = 25) and those from gestation-matched pregnancies with appropriately grown infants as controls (n = 25) were collected at gestation 27-40 weeks. Placental tissues were also collected from a spontaneous CBA/CaH × DBA/2 J murine model of FGR. Placental FPR2/Fpr2 mRNA expression was determined by real-time PCR, while protein expression was examined by immunoblotting and immunohistochemistry. siRNA transfection was used to silence FPR2 expression in primary trophoblasts and in human umbilical vein endothelial cells (HUVEC), and the quantitation of cytokines, chemokines and apoptosis was performed following a cDNA array analyses. Functional effects of trophoblast differentiation were measured using HCGB/β-hCG and syncytin-2 expression as well as markers of apoptosis, tumour protein 53 (TP53), caspase 8, B cell lymphoma 2 (BCL2) and BCL associated X (BAX). Endothelial function was assessed by proliferation, network formation and permeability assays. MAIN RESULTS AND THE ROLE OF CHANCE Placental FPR2/Fpr2 expression was significantly decreased in FGR placentae (n = 25, P < 0.05) as well as in murine FGR placentae compared to controls (n = 4, P < 0.05). FPR2 siRNA (siFPR2) in term trophoblasts significantly increased differentiation markers, HCGB and syncytin-2; cytokines, interleukin (IL)-6, CXCL8; and apoptotic markers, TP53, caspase 8 and BAX, but significantly reduced the expression of the chemokines CXCL12 and its receptors CXCR4 and CXCR7; CXCL16 and its receptor, CXCR6; and cytokine, IL-10, compared with control siRNA (siCONT). Treatment of HUVECs with siFPR2 significantly reduced proliferation and endothelial tube formation, but significantly increased permeability of HUVECs. LARGE SCALE DATA N/A. LIMITATIONS, REASONS FOR CAUTION Reduced expression of placental FPR2/Fpr2 was observed in the third trimester at delivery after development of FGR, suggesting that FPR2 is associated with FGR pregnancies. However, there is a possibility that the decreased placental FPR2 observed in FGR may be a consequence rather than a cause of FGR, although our in vitro functional analyses using primary trophoblasts and endothelial cells suggest that FPR2 may have a direct or indirect regulatory role on trophoblast differentiation and endothelial function in FGR. WIDER IMPLICATIONS OF THE FINDINGS This is the first study linking placental FPR2 expression with changes in the trophoblast and endothelial functions that may explain the placental insufficiency observed in FGR. STUDY FUNDING/COMPETING INTERESTS P.M. and P.R.E. received funding from the Australian Institute of Musculoskeletal Science, Western Health, St. Albans, Victoria 3021, Australia. M.L. is supported by a Career Development Fellowship from the National Health and Medical Research Council (NHMRC; Grant no. 1047025). Monash Health is supported by the Victorian Government's Operational Infrastructure Support Programme. The authors declare that there is no conflict of interest in publishing this work.
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Affiliation(s)
- Martha Lappas
- Mercy Perinatal Research Centre, Mercy Hospital for Women, Heidelberg, Victoria 3079, Australia.,Department of Obstetrics and Gynaecology, University of Melbourne, Heidelberg, Victoria 3079, Australia
| | - Sharon McCracken
- Division of Perinatal Research, Kolling Institute, Northern Sydney Local Health District, St Leonards, New South Wales 2065, Australia.,Sydney Medical School Northern, University of Sydney, New South Wales 2006, Australia
| | - Kelly McKelvey
- Division of Perinatal Research, Kolling Institute, Northern Sydney Local Health District, St Leonards, New South Wales 2065, Australia.,Sydney Medical School Northern, University of Sydney, New South Wales 2006, Australia
| | - Ratana Lim
- Mercy Perinatal Research Centre, Mercy Hospital for Women, Heidelberg, Victoria 3079, Australia.,Department of Obstetrics and Gynaecology, University of Melbourne, Heidelberg, Victoria 3079, Australia
| | - Joanna James
- Department of Obstetrics and Gynaecology, University of Auckland, New Zealand
| | - Claire T Roberts
- Adelaide Medical School and Robinson Research Institute, University of Adelaide, South Australia 5005, Australia
| | - Thierry Fournier
- INSERM, UMR-S1139, Faculté des Sciences Pharmaceutiques et Biologiques, Paris F-75006, France.,Université Paris Descartes, Sorbonne Paris Cité, Paris F-75006 France.,Fondation PremUp, Paris F-75006, France
| | - Nadia Alfaidy
- Institut National de la Santé et de la Recherche Médicale, Unité 1036, Grenoble, France.,University Grenoble-Alpes, 38000 Grenoble, France.,Commissariat à l'Energie Atomique (CEA), iRTSV- Biology of Cancer and Infection, Grenoble, France
| | - Katie L Powell
- Division of Perinatal Research, Kolling Institute, Northern Sydney Local Health District, St Leonards, New South Wales 2065, Australia.,Sydney Medical School Northern, University of Sydney, New South Wales 2006, Australia
| | - Anthony J Borg
- Department of Maternal-Fetal Medicine Pregnancy Research Centre, The Royal Women's Hospital, Parkville, Victoria 3052, Australia
| | - Jonathan M Morris
- Division of Perinatal Research, Kolling Institute, Northern Sydney Local Health District, St Leonards, New South Wales 2065, Australia.,Sydney Medical School Northern, University of Sydney, New South Wales 2006, Australia
| | - Bryan Leaw
- The Ritchie Centre, Hudson Institute of Medical Research, Clayton, Victoria 3168, Australia
| | - Harmeet Singh
- The Ritchie Centre, Hudson Institute of Medical Research, Clayton, Victoria 3168, Australia
| | - Peter R Ebeling
- Department of Medicine, School of Clinical Sciences, Monash University, Clayton, Victoria 3168, Australia
| | - Euan M Wallace
- The Ritchie Centre, Hudson Institute of Medical Research, Clayton, Victoria 3168, Australia.,Department of Obstetrics and Gynaecology, School of Clinical Sciences, Monash University, Clayton, Victoria 3168, Australia
| | - Laura J Parry
- School of Biosciences, University of Melbourne, Parkville, Victoria 3052, Australia
| | - Evdokia Dimitriadis
- Centre for Reproductive Health, Hudson Institute of Medical Research, Clayton, Victoria 3168, Australia
| | - Padma Murthi
- Department of Maternal-Fetal Medicine Pregnancy Research Centre, The Royal Women's Hospital, Parkville, Victoria 3052, Australia.,The Ritchie Centre, Hudson Institute of Medical Research, Clayton, Victoria 3168, Australia.,Department of Medicine, School of Clinical Sciences, Monash University, Clayton, Victoria 3168, Australia.,Department of Obstetrics and Gynaecology, University of Melbourne, Parkville, Victoria 3052, Australia
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Fetal biometry to assess the size and growth of the fetus. Best Pract Res Clin Obstet Gynaecol 2018; 49:3-15. [DOI: 10.1016/j.bpobgyn.2018.02.005] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2017] [Accepted: 02/14/2018] [Indexed: 01/13/2023]
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13
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Gardosi J, Francis A, Turner S, Williams M. Customized growth charts: rationale, validation and clinical benefits. Am J Obstet Gynecol 2018; 218:S609-S618. [PMID: 29422203 DOI: 10.1016/j.ajog.2017.12.011] [Citation(s) in RCA: 151] [Impact Index Per Article: 25.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2017] [Revised: 12/04/2017] [Accepted: 12/06/2017] [Indexed: 11/28/2022]
Abstract
Appropriate standards for the assessment of fetal growth and birthweight are central to good clinical care, and have become even more important with increasing evidence that growth-related adverse outcomes are potentially avoidable. Standards need to be evidence based and validated against pregnancy outcome and able to demonstrate utility and effectiveness. A review of proposals by the Intergrowth consortium to adopt their single international standard finds little support for the claim that the cases that it identifies as small are due to malnutrition or stunting, and substantial evidence that there is normal physiologic variation between different countries and ethnic groups. It is possible that the one-size-fits-all standard ends up fitting no one and could be harmful if implemented. An alternative is the concept of country-specific charts that can improve the association between abnormal growth and adverse outcome. However, such standards ignore individual physiologic variation that affects fetal growth, which exists in any heterogeneous population and exceeds intercountry differences. It is therefore more logical to adjust for the characteristics of each mother, taking her ethnic origin and her height, weight, and parity into account, and to set a growth and birthweight standard for each pregnancy against which actual growth can be assessed. A customized standard better reflects adverse pregnancy outcome at both ends of the fetal size spectrum and has increased clinicians' confidence in growth assessment, while providing reassurance when abnormal size merely represents physiologic variation. Rollout in the United Kingdom has proceeded as part of the comprehensive Growth Assessment Protocol (GAP), and has resulted in a steady increase in antenatal detection of babies who are at risk because of fetal growth restriction. This in turn has been accompanied by a year-on-year drop in stillbirth rates to their lowest ever levels in England. A global version of customized growth charts with over 100 ethnic origin categories is being launched in 2018, and will provide an individualized, yet universally applicable, standard for fetal growth.
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14
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Hiersch L, Melamed N. Fetal growth velocity and body proportion in the assessment of growth. Am J Obstet Gynecol 2018; 218:S700-S711.e1. [PMID: 29422209 DOI: 10.1016/j.ajog.2017.12.014] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2017] [Revised: 11/11/2017] [Accepted: 12/08/2017] [Indexed: 10/18/2022]
Abstract
Fetal growth restriction implies failure of a fetus to meet its growth potential and is associated with increased perinatal mortality and morbidity. Therefore, antenatal detection of fetal growth restriction is of major importance in an attempt to deliver improved clinical outcomes. The most commonly used approach towards screening for fetal growth restriction is by means of sonographic fetal weight estimation, to detect fetuses small for gestational age, defined by an estimated fetal weight <10th percentile for gestational age. However, the predictive accuracy of this approach is limited both by suboptimal detection rate (as it may overlook non-small-for-gestational-age growth-restricted fetuses) and by a high false-positive rate (as most small-for-gestational-age fetuses are not growth restricted). Here, we review 2 strategies that may improve the diagnostic accuracy of sonographic fetal biometry for fetal growth restriction. The first strategy involves serial ultrasound evaluations of fetal biometry. The information obtained through these serial assessments can be interpreted using several different approaches including fetal growth velocity, conditional percentiles, projection-based methods, and individualized growth assessment that can be viewed as mathematical techniques to quantify any decrease in estimated fetal weight percentile, a phenomenon that many care providers assess and monitor routinely in a qualitative manner. This strategy appears promising in high-risk pregnancies where it seems to improve the detection of growth-restricted fetuses at increased risk of adverse perinatal outcomes and, at the same time, decrease the risk of falsely diagnosing healthy constitutionally small-for-gestational-age fetuses as growth restricted. Further studies are needed to determine the utility of this strategy in low-risk pregnancies as well as to optimize its performance by determining the optimal timing and interval between exams. The second strategy refers to the use of fetal body proportions to classify fetuses as either symmetric or asymmetric using 1 of several ratios; these include the head circumference to abdominal circumference ratio, transverse cerebellar diameter to abdominal circumference ratio, and femur length to abdominal circumference ratio. Although these ratios are associated with small for gestational age at birth and with adverse perinatal outcomes, their predictive accuracy is too low for clinical practice. Furthermore, these associations become questionable when other, potentially more specific measures such as umbilical artery Doppler are being used. Furthermore, these ratios are of limited use in determining the etiology underlying fetal smallness. It is possible that the use of the 2 gestational-age-independent ratios (transverse cerebellar diameter to abdominal circumference and femur length to abdominal circumference) may have a role in the detection of mild-moderate fetal growth restriction in pregnancies without adequate dating. In addition, despite their limited predictive accuracy, these ratios may become abnormal early in the course of fetal growth restriction and may therefore identify pregnancies that may benefit from closer monitoring of fetal growth.
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Caradeux J, Eixarch E, Mazarico E, Basuki TR, Gratacós E, Figueras F. Second- to third-trimester longitudinal growth assessment for prediction of small-for-gestational age and late fetal growth restriction. ULTRASOUND IN OBSTETRICS & GYNECOLOGY : THE OFFICIAL JOURNAL OF THE INTERNATIONAL SOCIETY OF ULTRASOUND IN OBSTETRICS AND GYNECOLOGY 2018; 51:219-224. [PMID: 28332335 DOI: 10.1002/uog.17471] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2016] [Revised: 03/02/2017] [Accepted: 03/16/2017] [Indexed: 06/06/2023]
Abstract
OBJECTIVE Detection of fetal growth restriction (FGR) remains poor and most screening strategies rely on cross-sectional evaluation of fetal size during the third trimester. A longitudinal and individualized approach has been proposed as an alternative method of evaluation. The aim of this study was to compare second- to third-trimester longitudinal growth assessment to cross-sectional evaluation in the third trimester for the prediction of small-for-gestational age (SGA) and late FGR in low-risk singleton pregnancy. METHODS This was a prospective cohort study of 2696 unselected consecutive low-risk singleton pregnancies scanned at 21 ± 2 and 32 ± 2 weeks. For cross-sectional growth assessment, abdominal circumference (AC) measurements were transformed to z-values according the 21st-INTERGROWTH standards. Longitudinal growth assessment was performed by calculating the AC z-velocity and the second- to third-trimester AC conditional growth centile. Longitudinal assessment was compared with cross-sectional assessment at 32 weeks. Association of cross-sectional and longitudinal evaluations with SGA and late FGR was assessed by logistic regression analysis. Predictive performance was determined by receiver-operating characteristics curve analysis. RESULT In total, 210 (7.8%) newborns were classified as SGA and 103 (3.8%) as late FGR. Neither longitudinal measurement improved the association with SGA or late FGR provided by cross-sectional evaluation of AC z-score at 32 weeks. Areas under the curves of AC z-velocity and conditional AC growth were significantly smaller than those of cross-sectional AC z-scores (P < 0.001), although AC z-velocity performed significantly better than did conditional AC growth (P < 0.001). CONCLUSION Longitudinal assessment of fetal growth from the second to third trimester has a low predictive capacity for SGA and late FGR in low-risk singleton pregnancy compared with cross-sectional growth evaluation. Copyright © 2017 ISUOG. Published by John Wiley & Sons Ltd.
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Affiliation(s)
- J Caradeux
- Fetal i+D Fetal Medicine Research Center, BCNatal - Barcelona Center for Maternal-Fetal and Neonatal Medicine (Hospital Clínic and Hospital Sant Joan de Deu), IDIBAPS, University of Barcelona, Barcelona, Spain
- Fetal Medicine Unit, Clínica Dávila, Santiago, Chile
| | - E Eixarch
- Fetal i+D Fetal Medicine Research Center, BCNatal - Barcelona Center for Maternal-Fetal and Neonatal Medicine (Hospital Clínic and Hospital Sant Joan de Deu), IDIBAPS, University of Barcelona, Barcelona, Spain
- Center for Biomedical Research on Rare Diseases (CIBER-ER), Madrid, Spain
| | - E Mazarico
- Fetal i+D Fetal Medicine Research Center, BCNatal - Barcelona Center for Maternal-Fetal and Neonatal Medicine (Hospital Clínic and Hospital Sant Joan de Deu), IDIBAPS, University of Barcelona, Barcelona, Spain
| | - T R Basuki
- Fetal i+D Fetal Medicine Research Center, BCNatal - Barcelona Center for Maternal-Fetal and Neonatal Medicine (Hospital Clínic and Hospital Sant Joan de Deu), IDIBAPS, University of Barcelona, Barcelona, Spain
| | - E Gratacós
- Fetal i+D Fetal Medicine Research Center, BCNatal - Barcelona Center for Maternal-Fetal and Neonatal Medicine (Hospital Clínic and Hospital Sant Joan de Deu), IDIBAPS, University of Barcelona, Barcelona, Spain
- Center for Biomedical Research on Rare Diseases (CIBER-ER), Madrid, Spain
| | - F Figueras
- Fetal i+D Fetal Medicine Research Center, BCNatal - Barcelona Center for Maternal-Fetal and Neonatal Medicine (Hospital Clínic and Hospital Sant Joan de Deu), IDIBAPS, University of Barcelona, Barcelona, Spain
- Center for Biomedical Research on Rare Diseases (CIBER-ER), Madrid, Spain
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Amiri A, Turner-Henson A. The Roles of Formaldehyde Exposure and Oxidative Stress in Fetal Growth in the Second Trimester. J Obstet Gynecol Neonatal Nurs 2017; 46:51-62. [DOI: 10.1016/j.jogn.2016.08.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/01/2016] [Indexed: 01/13/2023] Open
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17
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Karlsen HO, Johnsen SL, Rasmussen S, Kiserud T. Prediction of adverse perinatal outcome of small-for-gestational-age pregnancy using size centiles and conditional growth centiles. ULTRASOUND IN OBSTETRICS & GYNECOLOGY : THE OFFICIAL JOURNAL OF THE INTERNATIONAL SOCIETY OF ULTRASOUND IN OBSTETRICS AND GYNECOLOGY 2016; 48:217-223. [PMID: 26663402 DOI: 10.1002/uog.15835] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2015] [Revised: 11/25/2015] [Accepted: 11/27/2015] [Indexed: 06/05/2023]
Abstract
OBJECTIVE To test whether adding conditional growth centiles to size centiles of estimated fetal weight (EFW) improves prediction of adverse perinatal outcome in pregnancies with or at risk of having a small-for-gestational-age (SGA) fetus. METHODS This prospective longitudinal study included pregnant women at risk of or diagnosed with an SGA (≤ 5(th) centile) fetus. They underwent serial ultrasound measurements and the final two were included in the analyses for this study. The EFW was categorized into normal (> 5(th) or 10(th) centile) and abnormal (≤ 5(th) or 10(th) centile) for size and conditional growth before entering the variables into log-binomial regression analyses. Adverse outcomes were delivery < 37 weeks, operative delivery due to fetal distress, 5-min Apgar score < 7, newborn hypoglycemia (glucose < 2.0 mmol/L), admission to the neonatal intensive care unit and perinatal mortality. A combined outcome variable ('any adverse outcome') included one or more adverse outcomes. RESULTS Complete biometric data were obtained for 211 women. Conditional growth and size centiles contributed independently to the prediction of adverse outcome. Combining conditional growth and size centiles significantly improved the prediction of outcomes compared with size centiles alone (e.g. for 5(th) centile cut-off for any adverse outcome, P = 0.023, log-likelihood test). Using a 5(th) centile threshold, for any adverse outcome, the specificity of 78% (95% CI, 70-84%) using size centile as a predictor was improved to 94% (95% CI, 89-97%) when conditional growth centile was added to the model, whereas the sensitivity was not significantly changed (60% (95% CI, 49-69%) vs 39% (95% CI, 30-50%)). CONCLUSIONS Size centiles and conditional growth centiles contribute independently to the prediction of adverse perinatal outcome, and their combination further improves the prediction model. The results support an increased use of conditional growth centiles in the monitoring of fetuses at risk. Copyright © 2015 ISUOG. Published by John Wiley & Sons Ltd.
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Affiliation(s)
- H O Karlsen
- Research Group for Pregnancy, Fetal Development and Birth, Department of Clinical Science, University of Bergen, Bergen, Norway
- Department of Obstetrics and Gynecology, Haukeland University Hospital, Bergen, Norway
| | - S L Johnsen
- Department of Obstetrics and Gynecology, Haukeland University Hospital, Bergen, Norway
| | - S Rasmussen
- Research Group for Pregnancy, Fetal Development and Birth, Department of Clinical Science, University of Bergen, Bergen, Norway
- Department of Obstetrics and Gynecology, Haukeland University Hospital, Bergen, Norway
| | - T Kiserud
- Research Group for Pregnancy, Fetal Development and Birth, Department of Clinical Science, University of Bergen, Bergen, Norway
- Department of Obstetrics and Gynecology, Haukeland University Hospital, Bergen, Norway
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Abstract
OBJECTIVES Impaired or excessive fetal growth is associated with adverse short- and long-term health outcomes that differ between ethnic groups. We explored ethnic differences in fetal size and growth from mid pregnancy until birth. METHODS Data are from the multi-ethnic STORK-Groruddalen study, a population-based, prospective cohort of 823 pregnant women and their offspring in Oslo, Norway. Measures were z-scores of estimated fetal weight (EFW), head circumference (HC), abdominal circumference (AC) and femur length (FL), in gestational week 24, 32 and 37, measured by ultrasound, and similar measures at birth. Differences in fetal size and growth were assessed using separate Linear Mixed Models including all four time points, with ethnic Europeans as reference. RESULTS In week 24 South Asian fetuses had smaller AC, but larger FL than Europeans, and slightly lower EFW (-0.17 SD (-0.33, -0.01), p=0.04). Middle East/North African fetuses also had larger FL, but similar AC, and hence slightly higher EFW (0.18 (0.003, 0.36), p=0.05). Both groups had slower growth of AC, FL and EFW from this time until birth, and had -0.61 SD (-0.73, -0.49) and -0.28 SD (-0.41, -0.15) lower birth weight respectively. Ethnic East Asians, on the other hand, were smaller throughout pregnancy and had -0.58 SD (-0.82, -0.34) lower birth weight. Significant ethnic differences remained after adjusting for maternal factors. CONCLUSION We observed ethnic differences in fetal size and body proportions already in gestational week 24, and in fetal growth from this time until birth, which were only partly explained by key maternal factors.
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Rytter D, Bech BH, Frydenberg M, Henriksen TB, Olsen SF. Fetal growth and cardio-metabolic risk factors in the 20-year-old offspring. Acta Obstet Gynecol Scand 2014; 93:1150-9. [PMID: 25053259 DOI: 10.1111/aogs.12463] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2013] [Accepted: 07/18/2014] [Indexed: 12/30/2022]
Abstract
OBJECTIVE To investigate the association between prenatal growth patterns as estimated by biparietal diameter and cardio-metabolic risk at 20 years. DESIGN Follow-up study. SETTING Denmark 1988-2009. POPULATION Two cohorts of children born between 1988 and 1990 (n=707) and followed up in 2008-2009 (n=333-509). METHODS We have access to biparietal diameter from early ultrasound scan and birthweight. For each gender, biparietal diameter and birthweight, gestational age-specific growth-z-scores were calculated. A change in growth trajectory was depicted as a shift in z-score for the two growth measures. Multiple linear regression modeling was used to estimate associations between biparietal diameter and birthweight z-scores and later cardio-metabolic risk factors as well as estimating whether changing growth trajectory was associated with later cardio-metabolic risk. MAIN OUTCOME MEASURES Self-reported anthropometrics and clinically measured blood pressure, heart rate and biochemical measures associated with cardio-metabolic health. RESULTS After adjustments, biparietal diameter was not associated with any of the outcomes. Birthweight was positively associated with both adult height and weight and inversely associated with insulin, triglyceride and insulin resistance. Also, the data indicated a U-shaped association between growth in the second half of pregnancy and adult body mass index among individuals with a low biparietal diameter in mid-pregnancy. CONCLUSION Different patterns of intrauterine growth may be associated with later risk of cardio-metabolic disease.
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Affiliation(s)
- Dorte Rytter
- Section for Epidemiology, Department of Public Health, Aarhus University, Aarhus, Denmark
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Deter RL, Lee W, Sangi-Haghpeykar H, Tarca AL, Yeo L, Romero R. A modified prenatal growth assessment score for the evaluation of fetal growth in the third trimester using single and composite biometric parameters. J Matern Fetal Neonatal Med 2014; 28:745-54. [PMID: 24993892 DOI: 10.3109/14767058.2014.934218] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
OBJECTIVE To define modified Prenatal Growth Assessment Scores (mPGAS) for single and composite biometric parameters and determine their reference ranges in normal fetuses. METHODS Nine anatomical parameters (ap) were measured and the weight estimated (EWTa, EWTb) in a longitudinal study of 119 fetuses with normal neonatal growth outcomes. Expected third trimester size trajectories, obtained from second trimester Rossavik size models, were used in calculating Percent Deviations (% Dev's) and their age-specific reference ranges in each fetus. The components of individual % Dev's values outside their reference ranges, designated +iapPGAS, -iapPGAS, were averaged to give +apPGAS and -apPGAS values for the 3rd trimester. The +iapPGAS and -iapPGAS values for different combinations of ap (c1a (HC, AC, FDL, ThC, EWTa), c1b (HC, AC, FDL, ThC, EWTb), c2 (ThC, ArmC, AVol, TVol), c3 (HC, AC, FDL, EWTa)) were then averaged to give +icPGAS and -icPGAS values at different time points or at the end of the third trimester (+cPGAS, -cPGAS). Values for iapPGAS, ic1bPGAS, and ic2PGAS were compared to their respective apPGAS or cPGAS reference ranges. RESULTS All mPGAS values had one 95% range boundary at 0.0%. Upper boundaries of 1D +apPGAS values ranged from 0.0% (HC) to +0.49% (ThC) and were +0.06%, +2.3% and +1.8% for EWT, AVol and TVol, respectively. Comparable values for -apPGAS were 0.0% (BPD, FDL, HDL), to -0.58% (ArmC), -0.13% (EWT), -0.8% (AVol), and 0.0% (TVol). The +cPGAS, 95% reference range upper boundaries varied from +0.36% (c1b) to +0.89% (c2). Comparable values for -cPGAS lower boundaries were -0.17% (c1b) to -0.43% (c2). CONCLUSIONS The original PGAS concept has now been extended to individual biometric parameters and their combinations. With the standards provided, mPGAS values can now be tested to see if detection of different types of third trimester growth problems is improved.
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Affiliation(s)
- Russell L Deter
- Department of Obstetrics and Gynecology, Baylor College of Medicine , Houston, TX , USA
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Espinoza J, Lee W, Martin SR, Belfort MA. Customized growth curves for identification of large-for-gestational age neonates in pre-eclamptic women. ULTRASOUND IN OBSTETRICS & GYNECOLOGY : THE OFFICIAL JOURNAL OF THE INTERNATIONAL SOCIETY OF ULTRASOUND IN OBSTETRICS AND GYNECOLOGY 2014; 43:165-169. [PMID: 23703927 DOI: 10.1002/uog.12518] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2013] [Revised: 05/13/2013] [Accepted: 05/13/2013] [Indexed: 06/02/2023]
Abstract
OBJECTIVES To compare the role of two nomograms to classify large-for-gestational age (LGA) neonates in women with pre-eclampsia and to determine the frequency of placental vascular lesions according to the timing of delivery. METHOD This cohort study included 118 consecutive women with pre-eclampsia delivering between 23 and 41 weeks’ gestation. The frequencies of LGA neonates according to customized growth curves and a national birth weight (BW) chart were compared. Similarly, the frequencies of LGA neonates and histological placental vascular lesions were compared between pre-eclamptic women delivering at <34 weeks (n=40) and those delivering later (n=78). RESULTS Customized growth curves allowed classification of a higher proportion of LGA neonates than did BW curves (18.6% (22/118) vs 10.2% (12/118); P=0.002). Among pre-eclamptic women delivering at ≥34 weeks, but not earlier, the proportion of neonates classified as LGA by customized growth curves was higher than that classified by BW curves (26.9% (21/78) vs 15.4% (12/78); P=0.004). Placental vascular lesions were less frequent in pre-eclamptic women delivering at ≥34 weeks than in those delivering earlier (41% (32/78) vs 62.5% (25/40); P=0.03). CONCLUSIONS Customized growth curves allow classification of a higher proportion of LGA neonates than do population birth weight curves among women with pre-eclampsia delivering at ≥34 weeks. Pre-eclamptic women delivering at ≥34 weeks have fewer placental vascular lesions than do those delivering earlier.
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Rasmussen S. Re: Customized growth curves for identification of large-for-gestational age neonates in pre-eclamptic women. J. Espinoza, W. Lee, S. R. Martin and M. A. Belfort. Ultrasound Obstet Gynecol 2014; 43: 165-169. ULTRASOUND IN OBSTETRICS & GYNECOLOGY : THE OFFICIAL JOURNAL OF THE INTERNATIONAL SOCIETY OF ULTRASOUND IN OBSTETRICS AND GYNECOLOGY 2014; 43:137. [PMID: 24497419 DOI: 10.1002/uog.13299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Affiliation(s)
- S Rasmussen
- Department of Clinical Science, Kvinneklinikken, Haukeland University Hospital, N-5021, Bergen, Norway.
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Parlakgumus HA, Aytac PC, Kalaycı H, Tarim E. First trimester maternal lipid levels and serum markers of small- and large-for-gestational age infants. J Matern Fetal Neonatal Med 2013; 27:48-51. [PMID: 23617575 DOI: 10.3109/14767058.2013.799658] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
OBJECTIVE To investigate if first trimester lipids, sonographic parameters and serum markers are related to small- and large-for-gestational age (SGA, LGA) infants. METHODS This study was conducted at Baskent University Adana Research Center between December 2009 and July 2011 and enrolled 433 women. Blood samples were drawn to measure fasting blood glucose, serum triglycerides, cholesterol, very low-density lipoprotein, low-density lipoprotein, high-density lipoprotein, fβ-hCG and pregnancy associated protein-A (PAPP-A) at the first trimester. Crown rump length and nuchal translucency were measured as suggested by the fetal medicine foundation. RESULTS LGA group was significantly taller (p = 0.016) and SGA group had significantly greater BMI (0.025). SGA fetuses were born at a significantly earlier gestational age (p = 0.001). Univariate analysis revealed that LGA group had significantly lower cholesterol (p = 0.038) and LDL levels (p = 0.041). PAPP-A was significantly lower in SGA Group compared with LGA Group (0.027). After controlling for age, parity, height, pre-pregnant BMI, weight gain during pregnancy and fasting blood sugar, none of the lipids, serum markers or sonographic parameters was related to LGA. PAPP-A was the only parameter significantly associated with SGA after multivariate analysis (p = 0.008). CONCLUSION PAPP-A was significantly associated with SGA after controlling for confounders.
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Affiliation(s)
- Huriye Ayse Parlakgumus
- Department of Obstetrics and Gynecology, Baskent University Faculty of Medicine , Ankara , Turkey
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van Uitert EM, Exalto N, Burton GJ, Willemsen SP, Koning AH, Eilers PH, Laven JS, Steegers EA, Steegers-Theunissen RP. Human embryonic growth trajectories and associations with fetal growth and birthweight. Hum Reprod 2013; 28:1753-61. [DOI: 10.1093/humrep/det115] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
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O’Connor C, Stuart B, Fitzpatrick C, Turner MJ, Kennelly MM. A review of contemporary modalities for identifying abnormal fetal growth. J OBSTET GYNAECOL 2013; 33:239-45. [DOI: 10.3109/01443615.2012.753423] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Abstract
PURPOSE OF REVIEW Recently, several international research groups have suggested that studies about environmental contaminants and adverse pregnancy outcomes should be designed to elucidate potential underlying biological mechanisms. The purpose of this review is to examine the epidemiological studies addressing maternal exposure to air pollutants and fetal growth during gestation as assessed by ultrasound measurements. RECENT FINDINGS The six studies published to date found that exposure to certain ambient air pollutants during pregnancy is negatively associated with the growth rates and average attained size of fetal parameters belonging to the growth profile. Fetal parameters may respond to maternal air pollution exposures uniquely, and this response may vary by pollutant and timing of gestational exposure. Current literature suggests that mean changes in head circumference, abdominal circumference, femur length, and biparietal diameter are negatively associated with early-pregnancy exposures to ambient and vehicle-related air pollution. SUMMARY The use of more longitudinal studies, employing ultrasound measures to assess fetal outcomes, may assist with the better understanding of mechanisms responsible for air pollution-related pregnancy outcomes.
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Pedersen NG, Sperling L, Wøjdemann KR, Larsen SO, Tabor A. First trimester growth restriction and uterine artery blood flow in the second trimester as predictors of adverse pregnancy outcome. Eur J Obstet Gynecol Reprod Biol 2013; 168:20-5. [PMID: 23298896 DOI: 10.1016/j.ejogrb.2012.12.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2012] [Revised: 11/07/2012] [Accepted: 12/04/2012] [Indexed: 11/25/2022]
Abstract
OBJECTIVES To investigate if fetuses with first trimester growth restriction have poorer perfusion of the placenta compared to a control group, and to investigate whether first trimester growth restriction in combination with poor flow in the uterine arteries in the second trimester can be used to predict poor outcome. STUDY DESIGN Women with singleton pregnancies, where the gestational age estimated by crown-rump length (CRL) at the first trimester scan was 7 days or more smaller than the gestational age estimated by last menstrual period, and a control group of women, where the gestational age was either equal to or 1 day larger than the gestational age estimated by last menstrual period, were invited to join the study. The study entailed the routine scans; Down syndrome screening in gestational week 11-14 and an anomaly scan in gestational week 18-21. In addition to the routine scans the participants were offered a growth scan in gestational week 23-24. At the anomaly scan and growth scan, umbilical and uterine artery Doppler flows were measured. RESULTS 182 cases and 230 controls were included in the study. The case and control groups showed no significant differences in placental blood flow characteristics at 18-21 weeks or 23-24 weeks. In our logistic regression models the only outcome that showed a significant association to the case group was birth weight below 2500 g. Having a CRL 7 days or more smaller than expected increased the risk of having a child with a birth weight below 2500 g with an odds ratio of 3.29. CONCLUSIONS We were unable to demonstrate a link between first trimester growth restriction and poor placental perfusion. The case group had increased risk of birth weight below 2500 g, but only with an odds ratio of 3. Therefore we do not recommend implementation of uterine or umbilical artery flow measurements specifically for fetuses with first trimester growth restriction.
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Affiliation(s)
- N G Pedersen
- Department of Fetal Medicine and Ultrasound, Rigshospitalet, Copenhagen University Hospital, Denmark.
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Mahendru AA, Daemen A, Everett TR, Wilkinson IB, McEniery CM, Abdallah Y, Timmerman D, Bourne T, Lees CC. Impact of ovulation and implantation timing on first-trimester crown-rump length and gestational age. ULTRASOUND IN OBSTETRICS & GYNECOLOGY : THE OFFICIAL JOURNAL OF THE INTERNATIONAL SOCIETY OF ULTRASOUND IN OBSTETRICS AND GYNECOLOGY 2012; 40:630-635. [PMID: 22858888 DOI: 10.1002/uog.12277] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 07/17/2012] [Indexed: 06/01/2023]
Abstract
OBJECTIVE To determine the impact of ovulation and implantation timing on first-trimester crown-rump length (CRL) and the derived gestational age (GA). METHOD One hundred and forty-three women who were trying to conceive were recruited prospectively. The timing of ovulation and implantation and the ovulation to implantation (O-I) interval were established in 101 pregnancies using home urinary tests for luteinizing hormone and human chorionic gonadotropin. In 71 ongoing pregnancies, GA determined by measurement of fetal CRL at 10-14 weeks' gestation was compared with GA based on ovulation and implantation day. First-trimester growth was determined by serial ultrasound scans at 6-7, 8-9 and 10-14 weeks. RESULTS The median ovulation and implantation days were 16 and 27, respectively, with an O-I interval of 11 days. GA estimated from CRL at 10-14 weeks was on average 1.3 days greater than that derived from ovulation timing. CRL Z-score was inversely related to O-I interval (ρ= -0.431, P=0.0009). There was no significant relationship between CRL growth rate and the difference between observed CRL and expected CRL based on GA from last menstrual period (ρ=0.224, P=0.08). CONCLUSIONS Early implantation leads to a larger CRL and late implantation to a smaller CRL at 10-14 weeks, independent of CRL growth rate. Implantation timing is a major determinant of fetal size at 10-14 weeks and largely explains the variation in estimates of GA in the first trimester derived from embryonic or fetal CRL.
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Affiliation(s)
- A A Mahendru
- Fetal Medicine Department, Rosie Hospital, Addenbrooke's Hospital, Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK
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Bouwland-Both MI, Steegers-Theunissen RPM, Vujkovic M, Lesaffre EMEH, Mook-Kanamori DO, Hofman A, Lindemans J, Russcher H, Jaddoe VWV, Steegers EAP. A periconceptional energy-rich dietary pattern is associated with early fetal growth: the Generation R study. BJOG 2012. [DOI: 10.1111/1471-0528.12086] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
| | | | - M Vujkovic
- Department of Obstetrics and Gynaecology; Erasmus University Medical Centre; Rotterdam; the Netherlands
| | - EMEH Lesaffre
- Department of Biostatistics; Erasmus University Medical Centre; Rotterdam; the Netherlands
| | | | - A Hofman
- Department of Epidemiology; Erasmus University Medical Centre; Rotterdam; the Netherlands
| | - J Lindemans
- Department of Clinical Chemistry; Erasmus University Medical Centre; Rotterdam; the Netherlands
| | - H Russcher
- Department of Clinical Chemistry; Erasmus University Medical Centre; Rotterdam; the Netherlands
| | | | - EAP Steegers
- Department of Obstetrics and Gynaecology; Erasmus University Medical Centre; Rotterdam; the Netherlands
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Simic M, Amer-Wåhlin I, Maršál K, Källén K. Effect of various dating formulae on sonographic estimation of gestational age in extremely preterm infants. ULTRASOUND IN OBSTETRICS & GYNECOLOGY : THE OFFICIAL JOURNAL OF THE INTERNATIONAL SOCIETY OF ULTRASOUND IN OBSTETRICS AND GYNECOLOGY 2012; 40:179-185. [PMID: 21953817 DOI: 10.1002/uog.10101] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
OBJECTIVES Gestational age (GA) is one of the most important obstetric factors and prediction of date of delivery is usually based on ultrasonographic fetal measurements. Our aim was to determine whether applying three different dating formulae to a cohort of extremely preterm infants influenced the estimation of their GA. METHODS This was a study of 513 infants delivered before 27 gestational weeks, included in a Swedish national population study (EXPRESS), with information available on mid-trimester ultrasonographically measured biparietal diameter and femur length. We applied using these parameters three dating formulae, the Persson & Weldner formula, commonly used in Sweden, the Hadlock formula and the Mul formula, and compared their GA estimates to the clinically reported GA (recorded at delivery) and the last menstrual period (LMP)-based GA. RESULTS The mean reported GA was 173.2 days, corresponding well to the GA according to the Persson & Weldner dating formula (173.3). The mean GA according to LMP, the Hadlock formula and the Mul formula were 176.8, 175.3 and 175.6 days, respectively. The Hadlock and Mul GA estimates differed significantly from that based on the Persson & Weldner formula (both P-values < 10(-6)). Among 68 pregnancies with a reported duration of 22 weeks, 33 (49%) had a duration of 23 weeks or more when GA was calculated according to LMP and 22 (32%) when GA was calculated according to the Hadlock formula. CONCLUSION Estimated GA among infants delivered before 27 gestational weeks varied significantly depending on the dating formula used to calculate the estimated date of delivery; this might influence the clinical management of extremely preterm fetuses and infants.
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Affiliation(s)
- M Simic
- Department of Women's and Children's Health, Karolinska Institutet, Stockholm, Sweden.
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Rijken MJ, Papageorghiou AT, Thiptharakun S, Kiricharoen S, Dwell SLM, Wiladphaingern J, Pimanpanarak M, Kennedy SH, Nosten F, McGready R. Ultrasound evidence of early fetal growth restriction after maternal malaria infection. PLoS One 2012; 7:e31411. [PMID: 22347473 PMCID: PMC3276538 DOI: 10.1371/journal.pone.0031411] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2011] [Accepted: 01/10/2012] [Indexed: 11/30/2022] Open
Abstract
Background Intermittent preventive treatment (IPT), the main strategy to prevent malaria and reduce anaemia and low birthweight, focuses on the second half of pregnancy. However, intrauterine growth restriction may occur earlier in pregnancy. The aim of this study was to measure the effects of malaria in the first half of pregnancy by comparing the fetal biparietal diameter (BPD) of infected and uninfected women whose pregnancies had been accurately dated by crown rump length (CRL) before 14 weeks of gestation. Methodology/Principal Findings In 3,779 women living on the Thai-Myanmar border who delivered a normal singleton live born baby between 2001–10 and who had gestational age estimated by CRL measurement <14 weeks, the observed and expected BPD z-scores (<24 weeks) in pregnancies that were (n = 336) and were not (n = 3,443) complicated by malaria between the two scans were compared. The mean (standard deviation) fetal BPD z-scores in women with Plasmodium (P) falciparum and/or P.vivax malaria infections were significantly lower than in non-infected pregnancies; −0.57 (1.13) versus −0.10 (1.17), p<0.001. Even a single or an asymptomatic malaria episode resulted in a significantly lower z-score. Fetal female sex (p<0.001) and low body mass index (p = 0.01) were also independently associated with a smaller BPD in multivariate analysis. Conclusions/Significance Despite early treatment in all positive women, one or more (a)symptomatic P.falciparum or P.vivax malaria infections in the first half of pregnancy result in a smaller than expected mid-trimester fetal head diameter. Strategies to prevent malaria in pregnancy should include early pregnancy.
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Kramer MS, Papageorghiou A, Culhane J, Bhutta Z, Goldenberg RL, Gravett M, Iams JD, Conde-Agudelo A, Waller S, Barros F, Knight H, Villar J. Challenges in defining and classifying the preterm birth syndrome. Am J Obstet Gynecol 2012; 206:108-12. [PMID: 22118964 DOI: 10.1016/j.ajog.2011.10.864] [Citation(s) in RCA: 135] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2011] [Revised: 08/27/2011] [Accepted: 10/19/2011] [Indexed: 10/15/2022]
Abstract
In 2009, the Global Alliance to Prevent Prematurity and Stillbirth Conference charged the authors to propose a new comprehensive, consistent, and uniform classification system for preterm birth. This first article reviews issues related to measurement of gestational age, clinical vs etiologic phenotypes, inclusion vs exclusion of multifetal and stillborn infants, and separation vs combination of pathways to preterm birth. The second article proposes answers to the questions raised here, and the third demonstrates how the proposed system might work in practice.
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Marsoosi V, Pirjani R, Jamal A, Eslamian L, Rahimi-Foroushani A. Second trimester biparietal diameter size and the risk of adverse pregnancy outcomes. Prenat Diagn 2011; 31:995-8. [DOI: 10.1002/pd.2823] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2011] [Revised: 06/09/2011] [Accepted: 06/09/2011] [Indexed: 11/05/2022]
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Comparative Efficiency of Measures of Early Fetal Growth Restriction for Predicting Adverse Perinatal Outcomes. Obstet Gynecol 2011; 117:1331-1340. [DOI: 10.1097/aog.0b013e31821ae239] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Salomon LJ, Hourrier S, Fanchin R, Ville Y, Rozenberg P. Is first-trimester crown-rump length associated with birthweight? BJOG 2011; 118:1223-8. [DOI: 10.1111/j.1471-0528.2011.03009.x] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Intrauterine growth restriction: new concepts in antenatal surveillance, diagnosis, and management. Am J Obstet Gynecol 2011; 204:288-300. [PMID: 21215383 DOI: 10.1016/j.ajog.2010.08.055] [Citation(s) in RCA: 280] [Impact Index Per Article: 21.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2010] [Revised: 08/10/2010] [Accepted: 08/27/2010] [Indexed: 12/26/2022]
Abstract
Intrauterine growth restriction (IUGR) remains one of the main challenges in maternity care. Improvements have to start from a better definition of IUGR, applying the concept of the fetal growth potential. Customized standards for fetal growth and birthweight improve the detection of IUGR by better distinction between physiological and pathological smallness and have led to internationally applicable norms. Such developments have resulted in new insights in the assessment of risk and surveillance during pregnancy. Serial fundal height measurement plotted on customized charts is a useful screening tool, whereas fetal biometry and Doppler flow are the mainstay for investigation and diagnosis of IUGR. Appropriate protocols based on available evidence as well as individualized clinical assessment are essential to ensure good management and timely delivery.
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Rasmussen S. Charts to assess fetal wellbeing. ULTRASOUND IN OBSTETRICS & GYNECOLOGY : THE OFFICIAL JOURNAL OF THE INTERNATIONAL SOCIETY OF ULTRASOUND IN OBSTETRICS AND GYNECOLOGY 2011; 37:2-5. [PMID: 21182105 DOI: 10.1002/uog.8897] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Affiliation(s)
- S Rasmussen
- Department of Obstetrics and Gynaecology, Haukeland University Hospital, N-5021 Bergen, Norway.
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Schwartz N, Pessel C, Coletta J, Krieger AM, Timor-Tritsch IE. Early biometric lag in the prediction of small for gestational age neonates and preeclampsia. JOURNAL OF ULTRASOUND IN MEDICINE : OFFICIAL JOURNAL OF THE AMERICAN INSTITUTE OF ULTRASOUND IN MEDICINE 2011; 30:55-60. [PMID: 21193705 DOI: 10.7863/jum.2011.30.1.55] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
OBJECTIVE An early fetal growth lag may be a marker of future complications. We sought to determine the utility of early biometric variables in predicting adverse pregnancy outcomes. METHODS In this retrospective cohort study, the crown-rump length at 11 to 14 weeks and the head circumference, biparietal diameter, abdominal circumference, femur length, humerus length, transverse cerebellar diameter, and estimated fetal weight at 18 to 24 weeks were converted to an estimated gestational age using published regression formulas. Sonographic fetal growth (difference between each biometric gestational age and the crown-rump length gestational age) minus expected fetal growth (number of days elapsed between the two scans) yielded the biometric growth lag. These lags were tested as predictors of small for gestational age (SGA) neonates (≤10th percentile) and preeclampsia. RESULTS A total of 245 patients were included. Thirty-two (13.1%) delivered an SGA neonate, and 43 (17.6%) had the composite outcome. The head circumference, biparietal diameter, abdominal circumference, and estimated fetal weight lags were identified as significant predictors of SGA neonates after adjusted analyses (P < .05). The addition of either the estimated fetal weight or abdominal circumference lag to maternal characteristics alone significantly improved the performance of the predictive model, achieving areas under the curve of 0.72 and 0.74, respectively. No significant association was found between the biometric lag variables and the development of preeclampsia. CONCLUSIONS Routinely available biometric data can be used to improve the prediction of adverse outcomes such as SGA. These biometric lags should be considered in efforts to develop screening algorithms for adverse outcomes.
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Affiliation(s)
- Nadav Schwartz
- Department of Obstetrics and Gynecology, Maternal and Child Health Research Program, Hospital of the University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA.
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Pedersen NG, Juul A, Christiansen M, Wøjdemann KR, Tabor A. Maternal serum placental growth hormone, but not human placental lactogen or insulin growth factor-1, is positively associated with fetal growth in the first half of pregnancy. ULTRASOUND IN OBSTETRICS & GYNECOLOGY : THE OFFICIAL JOURNAL OF THE INTERNATIONAL SOCIETY OF ULTRASOUND IN OBSTETRICS AND GYNECOLOGY 2010; 36:534-541. [PMID: 20560132 DOI: 10.1002/uog.7727] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
OBJECTIVE To investigate if maternal levels of human placental lactogen (hPL), placental growth hormone (PGH) and insulin-like growth factor-1 (IGF-1) are associated with growth rate of the biparietal diameter (BPD) in the first half of pregnancy. METHODS Data on 8215 singleton fetuses from the Copenhagen First Trimester Study with measurements of BPD from ultrasound scans performed at weeks 11-14 and 17-21 of pregnancy were analyzed. Growth rate was defined as millimeters of growth/day of BPD between the two scans. Fetuses with growth rate below the 2.5(th) centile (low growth rate, n = 203) and above the 97.5(th) centile (high growth rate, n = 203) were identified. As a reference group 212 fetuses with growth rate around the median were identified (intermediate growth rate). Out of the 618 selected cases in the three growth rate groups a total of 463 cases had a blood sample taken at the time of first-trimester ultrasound (5.6% of the original sample size of 8215 pregnancies). The maternal blood serum concentrations of hPL, PGH and IGF-1 were determined in the three different growth-rate groups. Linear regression analysis without adjustment and with adjustment for known and potential confounders was used to compare serum levels between the groups. RESULTS Simple linear regression showed a difference in serum level of log(10) PGH between the high and intermediate growth-rate groups (P = 0.037). When adjusted for maternal weight and crown-rump length, multiple linear regression analysis confirmed this difference, as fetuses with high growth rates had a 12% (95% confidence interval, 2-20%; P = 0.009) higher maternal serum level of PGH than those with intermediate growth rates. No differences in hPL and IGF-1 levels between the three different growth-rate groups were found after simple and multiple linear regression analysis. CONCLUSION Maternal PGH levels are higher in women carrying fetuses with high first-trimester growth rates than in controls, both in a simple unadjusted analysis and in analyses adjusted for known and potential confounders. Thus, PGH may be involved in fetal growth regulation as early as in the first trimester of pregnancy.
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Affiliation(s)
- N G Pedersen
- Department of Fetal Medicine and Ultrasound, Rigshospitalet, Copenhagen University Hospital, Copenhagen, Denmark.
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Zhang J, Merialdi M, Platt LD, Kramer MS. Defining normal and abnormal fetal growth: promises and challenges. Am J Obstet Gynecol 2010; 202:522-8. [PMID: 20074690 DOI: 10.1016/j.ajog.2009.10.889] [Citation(s) in RCA: 176] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2009] [Revised: 07/06/2009] [Accepted: 10/29/2009] [Indexed: 11/27/2022]
Abstract
Normal fetal growth is a critical component of a healthy pregnancy and influences the long-term health of the offspring. However, defining normal and abnormal fetal growth has been a long-standing challenge in clinical practice and research. We review various references and standards that are used widely to evaluate fetal growth and discuss common pitfalls of current definitions of abnormal fetal growth. Pros and cons of different approaches to customize fetal growth standards are described. We further discuss recent advances toward an integrated definition for fetal growth restriction. Such a definition may incorporate fetal size with the status of placental health that is measured by maternal and fetal Doppler velocimetry and biomarkers, biophysical findings, and genetics. Although the concept of an integrated definition appears promising, further development and testing are required. An improved definition of abnormal fetal growth should benefit both research and clinical practice.
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Romero R, Chaiworapongsa T, Erez O, Tarca AL, Gervasi MT, Kusanovic JP, Mittal P, Ogge G, Vaisbuch E, Mazaki-Tovi S, Dong Z, Kim SK, Yeo L, Hassan SS. An imbalance between angiogenic and anti-angiogenic factors precedes fetal death in a subset of patients: results of a longitudinal study. J Matern Fetal Neonatal Med 2010; 23:1384-99. [PMID: 20459337 DOI: 10.3109/14767051003681121] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
OBJECTIVE Women with a fetal death at the time of diagnosis have higher maternal plasma concentrations of the anti-angiogenic factor, soluble vascular endothelial growth factor receptor (sVEGFR)-1, than women with a normal pregnancy. An important question is whether these changes are the cause or consequence of fetal death. To address this issue, we conducted a longitudinal study and measured the maternal plasma concentrations of selective angiogenic and anti-angiogenic factors before the diagnosis of a fetal death. The anti-angiogenic factors studied were sVEGFR-1 and soluble endoglin (sEng), and the angiogenic factor, placental growth factor (PlGF). METHODS This retrospective longitudinal nested case-control study included 143 singleton pregnancies in the following groups: (1) patients with uncomplicated pregnancies who delivered a term infant with an appropriate weight for gestational age (n=124); and (2) patients who had a fetal death (n=19). Blood samples were collected at each prenatal visit, scheduled at 4-week intervals from the first trimester until delivery. Plasma concentrations of sVEGFR-1, sEng, and PlGF were determined by specific and sensitive ELISA. A linear mixed-effects model was used for analysis. RESULTS (1) The average profiles of analyte concentrations as a function of gestational age for sVEGFR-1, sEng and PlGF were different between women destined to have a fetal death and those with a normal pregnancy after adjusting for covariates (p<0.05); (2) Plasma sVEGFR-1 concentrations in patients destined to have a fetal death were significantly lower between 7 and 11 weeks of gestation and became significantly higher than those of women with a normal pregnancy between 20 and 37 weeks of gestation (p<0.05); (3) Similarly, plasma sEng concentrations of women destined to have a fetal death were lower at 7 weeks of gestation (p=0.04) and became higher than those of controls between 20 and 40 weeks of gestation (p<0.05); (4) In contrast, plasma PlGF concentrations were higher among patients destined to develop a fetal death between 7 and 14 weeks of gestation and became significantly lower than those in the control group between 22 and 39 weeks of gestation (p<0.05); (5) The ratio of PlGF/(sVEGFR-1 × sEng) was significantly higher in women destined to have a fetal death between 7 and 13 weeks of gestation (94-781%) and significantly lower (44-75%) than those in normal pregnant women between 20 and 40 weeks of gestation (p<0.05); (6) Similar results were obtained when patients with a fetal death were stratified into those who were diagnosed before or after 37 weeks of gestation. CONCLUSIONS Fetal death is characterised by higher maternal plasma concentrations of PlGF during the first trimester compared to normal pregnancy. This profile changes into an anti-angiogenic one during the second and third trimesters.
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Affiliation(s)
- Roberto Romero
- Perinatology Research Branch, NICHD, NIH, DHHS, Wayne State University/Hutzel Women's Hospital, 3990 John R, Box 4, Detroit, MI 48201, USA.
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Aguilera I, Garcia-Esteban R, Iñiguez C, Nieuwenhuijsen MJ, Rodríguez À, Paez M, Ballester F, Sunyer J. Prenatal exposure to traffic-related air pollution and ultrasound measures of fetal growth in the INMA Sabadell cohort. ENVIRONMENTAL HEALTH PERSPECTIVES 2010; 118:705-11. [PMID: 20103496 PMCID: PMC2866689 DOI: 10.1289/ehp.0901228] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2009] [Accepted: 01/26/2010] [Indexed: 05/17/2023]
Abstract
BACKGROUND Few studies have used longitudinal ultrasound measurements to assess the effect of traffic-related air pollution on fetal growth. OBJECTIVE We examined the relationship between exposure to nitrogen dioxide (NO2) and aromatic hydrocarbons [benzene, toluene, ethylbenzene, m/p-xylene, and o-xylene (BTEX)] on fetal growth assessed by 1,692 ultrasound measurements among 562 pregnant women from the Sabadell cohort of the Spanish INMA (Environment and Childhood) study. METHODS We used temporally adjusted land-use regression models to estimate exposures to NO2 and BTEX. We fitted mixed-effects models to estimate longitudinal growth curves for femur length (FL), head circumference (HC), abdominal circumference (AC), biparietal diameter (BPD), and estimated fetal weight (EFW). Unconditional and conditional SD scores were calculated at 12, 20, and 32 weeks of gestation. Sensitivity analyses were performed considering time-activity patterns during pregnancy. RESULTS Exposure to BTEX from early pregnancy was negatively associated with growth in BPD during weeks 20-32. None of the other fetal growth parameters were associated with exposure to air pollution during pregnancy. When considering only women who spent < 2 hr/day in nonresidential outdoor locations, effect estimates were stronger and statistically significant for the association between NO2 and growth in HC during weeks 12-20 and growth in AC, BPD, and EFW during weeks 20-32. CONCLUSIONS Our results lend some support to an effect of exposure to traffic-related air pollutants from early pregnancy on fetal growth during mid-pregnancy..
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Affiliation(s)
- Inmaculada Aguilera
- Centre for Research in Environmental Epidemiology, Barcelona, Spain
- Municipal Institute of Medical Research (IMIM-Hospital del Mar), Barcelona, Spain
- Centro de Investigación Biomédica en Red de Epidemiología y Salud Pública, Barcelona, Spain
- Pompeu Fabra University, Barcelona, Spain
- Address correspondence to I. Aguilera, Centre for Research in Environmental Epidemiology (CREAL), Barcelona Biomedical Research Park, Doctor Aiguader 88, Barcelona, Spain 08003. Telephone: 34-932147300. Fax: 34-932147301. E-mail:
| | - Raquel Garcia-Esteban
- Centre for Research in Environmental Epidemiology, Barcelona, Spain
- Municipal Institute of Medical Research (IMIM-Hospital del Mar), Barcelona, Spain
- Centro de Investigación Biomédica en Red de Epidemiología y Salud Pública, Barcelona, Spain
| | - Carmen Iñiguez
- Centro de Investigación Biomédica en Red de Epidemiología y Salud Pública, Barcelona, Spain
- Centre for Public Health Research, Conselleria de Sanitat, Generalitat Valenciana, Valencia, Spain
| | - Mark J. Nieuwenhuijsen
- Centre for Research in Environmental Epidemiology, Barcelona, Spain
- Municipal Institute of Medical Research (IMIM-Hospital del Mar), Barcelona, Spain
- Centro de Investigación Biomédica en Red de Epidemiología y Salud Pública, Barcelona, Spain
| | - Àgueda Rodríguez
- Servei de Ginecologia i Obstetrícia, Hospital Parc Taulí, Sabadell, Spain
| | | | - Ferran Ballester
- Centro de Investigación Biomédica en Red de Epidemiología y Salud Pública, Barcelona, Spain
- Centre for Public Health Research, Conselleria de Sanitat, Generalitat Valenciana, Valencia, Spain
| | - Jordi Sunyer
- Centre for Research in Environmental Epidemiology, Barcelona, Spain
- Municipal Institute of Medical Research (IMIM-Hospital del Mar), Barcelona, Spain
- Centro de Investigación Biomédica en Red de Epidemiología y Salud Pública, Barcelona, Spain
- Pompeu Fabra University, Barcelona, Spain
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Salomon LJ. Early fetal growth: concepts and pitfalls. ULTRASOUND IN OBSTETRICS & GYNECOLOGY : THE OFFICIAL JOURNAL OF THE INTERNATIONAL SOCIETY OF ULTRASOUND IN OBSTETRICS AND GYNECOLOGY 2010; 35:385-389. [PMID: 20373482 DOI: 10.1002/uog.7623] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Affiliation(s)
- L J Salomon
- Université Paris Descartes, Service de Gynécologie Obstétrique, Centre Hospitalo-Universitaire Necker-Enfants Malades, AP-HP, 75015 Paris, France.
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Risk factors for small for gestational age infants. Best Pract Res Clin Obstet Gynaecol 2009; 23:779-93. [DOI: 10.1016/j.bpobgyn.2009.06.003] [Citation(s) in RCA: 241] [Impact Index Per Article: 16.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2009] [Accepted: 06/06/2009] [Indexed: 11/19/2022]
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Kho EM, North RA, Chan E, Stone PR, Dekker GA, McCowan LME. Changes in Doppler flow velocity waveforms and fetal size at 20 weeks gestation among cigarette smokers. BJOG 2009; 116:1300-6. [DOI: 10.1111/j.1471-0528.2009.02266.x] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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