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Wu X, Huang B, Xie X, Cai M, Chen Y, Liang B, Shen Q, Guo D, Lin N, Su L, Xu L. Genetic evaluation for twin pregnancies using karyotyping and single nucleotide polymorphism array analysis. Gene 2024; 895:148005. [PMID: 37977315 DOI: 10.1016/j.gene.2023.148005] [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: 08/20/2023] [Revised: 11/03/2023] [Accepted: 11/14/2023] [Indexed: 11/19/2023]
Abstract
The study aimed to assess chromosomal abnormalities in twin pregnancies using karyotyping and SNP array analysis. The research involved 530 twin pregnancies from two prenatal diagnosis centers between October 2012 and October 2022. Two types of twin pregnancies were considered: monochorionic diamniotic (MCDA) and dichorionic diamniotic (DCDA), with a total of 177 MCDA and 353 DCDA cases. Chromosomal abnormalities were examined based on chorionic and amniotic sac properties and clinical indications. Among 42 twin pregnancies, 50 fetuses showed chromosomal abnormalities by karyotyping, with 35 cases of aneuploidy in DCDA and 10 in MCDA. Trisomy 21 was the most common aberration, affecting 15 fetuses in DCDA and 4 in MCDA. The rate of discordant karyotypes in MCDA and DCDA groups was 1.1% and 8.8%, respectively. Ultrasound abnormalities and advanced maternal age were frequent indications (55.3% and 39.2%, respectively). Aneuploidy frequencies in DCDA and MCDA pregnancies with advanced maternal age were 10.6% and 4.5%. Cardiac defects and increased nuchal translucency were common anomalies, with higher incidences of chromosomal abnormalities in DCDA (12.5% and 6.9%) and MCDA groups (23.5% and 3.7%). SNP array identified 1.6% clinically significant copy number variants in DCDA fetuses with ultrasound abnormalities, while no significant CNVs were found in MCDA pregnancies. Chromosomal aneuploidies were the primary abnormalities in twin pregnancies, with detectable abnormalities and clinically significant CNVs more likely in DCDA pregnancies, especially those with ultrasound abnormalities.
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Affiliation(s)
- Xiaoqing Wu
- Medical Genetic Diagnosis and Therapy Center of Fujian Maternity and Child Health Hospital, College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, Fuzhou, Fujian, China; Fujian Provincial Key Laboratory for Prenatal Diagnosis and Birth Defect, Fuzhou, Fujian, China; Department of Laboratory Medicine, Fujian Medical University, Fuzhou, Fujian, China
| | - Baojia Huang
- Prenatal Diagnosis Center, Quanzhou Women's and Children's Hospital, Quanzhou, Fujian, China
| | - Xiaorui Xie
- Medical Genetic Diagnosis and Therapy Center of Fujian Maternity and Child Health Hospital, College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, Fuzhou, Fujian, China; Fujian Provincial Key Laboratory for Prenatal Diagnosis and Birth Defect, Fuzhou, Fujian, China
| | - Meiying Cai
- Medical Genetic Diagnosis and Therapy Center of Fujian Maternity and Child Health Hospital, College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, Fuzhou, Fujian, China; Fujian Provincial Key Laboratory for Prenatal Diagnosis and Birth Defect, Fuzhou, Fujian, China
| | - Yuqin Chen
- Medical Genetic Diagnosis and Therapy Center of Fujian Maternity and Child Health Hospital, College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, Fuzhou, Fujian, China; Fujian Provincial Key Laboratory for Prenatal Diagnosis and Birth Defect, Fuzhou, Fujian, China
| | - Bin Liang
- Medical Genetic Diagnosis and Therapy Center of Fujian Maternity and Child Health Hospital, College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, Fuzhou, Fujian, China; Fujian Provincial Key Laboratory for Prenatal Diagnosis and Birth Defect, Fuzhou, Fujian, China
| | - Qingmei Shen
- Medical Genetic Diagnosis and Therapy Center of Fujian Maternity and Child Health Hospital, College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, Fuzhou, Fujian, China; Fujian Provincial Key Laboratory for Prenatal Diagnosis and Birth Defect, Fuzhou, Fujian, China
| | - Danhua Guo
- Medical Genetic Diagnosis and Therapy Center of Fujian Maternity and Child Health Hospital, College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, Fuzhou, Fujian, China; Fujian Provincial Key Laboratory for Prenatal Diagnosis and Birth Defect, Fuzhou, Fujian, China
| | - Na Lin
- Medical Genetic Diagnosis and Therapy Center of Fujian Maternity and Child Health Hospital, College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, Fuzhou, Fujian, China; Fujian Provincial Key Laboratory for Prenatal Diagnosis and Birth Defect, Fuzhou, Fujian, China.
| | - Linjuan Su
- Medical Genetic Diagnosis and Therapy Center of Fujian Maternity and Child Health Hospital, College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, Fuzhou, Fujian, China; Fujian Provincial Key Laboratory for Prenatal Diagnosis and Birth Defect, Fuzhou, Fujian, China.
| | - Liangpu Xu
- Medical Genetic Diagnosis and Therapy Center of Fujian Maternity and Child Health Hospital, College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, Fuzhou, Fujian, China; Fujian Provincial Key Laboratory for Prenatal Diagnosis and Birth Defect, Fuzhou, Fujian, China.
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Labadini C, Lohmann L, Ville Y, Quarello E. Monochorionic twins with discordant trisomy 21, another case to remind this uncommon condition and how to deal with. J Gynecol Obstet Hum Reprod 2023; 52:102620. [PMID: 37295772 DOI: 10.1016/j.jogoh.2023.102620] [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: 02/07/2023] [Revised: 05/09/2023] [Accepted: 06/07/2023] [Indexed: 06/12/2023]
Abstract
Monozygotic twins discordant for trisomy 21 are rare. We present the twelfth reported case of this uncommon condition undergoing invasive prenatal diagnosis. Dealing with discordant fetal anomalies in monochorionic pregnancy can be challenging for physicians and patients; pros and cons of different invasive procedure options must be discussed with the couple, contending with certain specific peculiarities of this type of pregnancy. Although chorionic villi sampling can be performed earlier, higher risk of misdiagnosis of discordant aneuploidy is reported. Indeed, when heterokaryotic twins are suspected, a two-sampling amniocentesis is recommended, to ensure independent sampling of each fetus and to rule out confined placental mosaicism as well. The couple should be informed of the possible management and the risks for the non-affected twin whether selective reduction is required, and likewise if the pregnancy continues without selective termination.
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Affiliation(s)
- Corinne Labadini
- Institut méditerranéen d'imagerie médicale appliquée à la gynécologie, la grossesse et l'enfance IMAGE(2), 6 Rue Rocca, 13008 Marseille, France; Unité de dépistage et de diagnostic prénatal, Hôpital Saint-Joseph, 26, boulevard de Louvain, 13285 Marseille cedex, France; Department of Medicine and Surgery, Obstetrics and Gynecology Unit, University of Parma, Parma, Italy
| | | | - Yves Ville
- Department of Obstetrics and Fetal Medicine, APHP Necker-Enfants Malades University Hospital, 75015 Paris, France
| | - Edwin Quarello
- Institut méditerranéen d'imagerie médicale appliquée à la gynécologie, la grossesse et l'enfance IMAGE(2), 6 Rue Rocca, 13008 Marseille, France; Unité de dépistage et de diagnostic prénatal, Hôpital Saint-Joseph, 26, boulevard de Louvain, 13285 Marseille cedex, France.
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Liu X, Wang J, Luo W, Wang Q, Liu Z, Wang H, Liu S, Hu T. The risk factors of procedure-related complications after amniocentesis in twin pregnancies: a retrospective analysis. BMC Pregnancy Childbirth 2023; 23:587. [PMID: 37582700 PMCID: PMC10428564 DOI: 10.1186/s12884-023-05884-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2023] [Accepted: 07/29/2023] [Indexed: 08/17/2023] Open
Abstract
BACKGROUND There is an increasing demand for prenatal diagnostic testing in twin pregnancies, however, anecdotally there is a higher incidence of procedure-related complications after amniocentesis than that in singleton pregnancies. There is a paucity of data regarding risk factors of amniocentesis in twin pregnancies. METHODS Women with twin pregnancies who underwent amniocentesis between January 2016 and December 2020 were enrolled in this retrospective study. Procedure-related complications including spontaneous miscarriage, intrauterine fetal death, spontaneous preterm delivery, preterm premature rupture of membranes, and placental abruption in one or both fetuses after amniocentesis were assessed. Meanwhile, potential risk factors related to amniocentesis including chorionicity, gestational age, conception, number of needle insertions, parity, history of miscarriage, indications, and pregnancy-related complications (pregnancy-induced hypertension and gestational diabetes) were also recorded. RESULTS A total of 811 women with twin pregnancies underwent amniocentesis were included, with a procedure-related complications rate of 3.83%. Risk factors associated with increased risk of procedure-related complications after amniocentesis in twin pregnancies were chorionicity (adjusted odds ratio [aOR]: 4.06), gestational age at the procedure (aOR: 2.76), and numbers of needle insertions (aOR: 3.26). In the monochorionic twin pregnancy, hemorrhage during this pregnancy (aOR: 12.01), polyhydramnios (aOR: 5.03), and numbers of needle insertions (aOR: 3.15) were risk factors after amniocentesis. In the dichorionic twin pregnancy, gestational age at the procedure (OR:4.47) affected the risk of procedure-related complications after amniocentesis. In the subgroup of gestational age at the procedure ≤ 24+ 0 weeks, risk factors associated with increased risk of procedure-related complications after amniocentesis in twin pregnancies were chorionicity (aOR: 5.14), and numbers of needle insertions (aOR: 3.76). CONCLUSION The procedure-related complications rate is 3.83% in our institution during the study period. The present study has emphasized the significance of certain risk factors for adverse outcome and will be useful in counseling patients with twin pregnancies.
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Affiliation(s)
- Xijing Liu
- Department of Medical Genetics, West China Second University Hospital, Sichuan University, No. 20, Section 3, Renminnan Road, Chengdu, 610041, Sichuan, China
- Department of Obstetrics and Gynecology, West China Second University Hospital, Sichuan University, Chengdu, 610041, Sichuan, China
- Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, Chengdu, 610041, China
| | - Jiamin Wang
- Department of Medical Genetics, West China Second University Hospital, Sichuan University, No. 20, Section 3, Renminnan Road, Chengdu, 610041, Sichuan, China
- Department of Obstetrics and Gynecology, West China Second University Hospital, Sichuan University, Chengdu, 610041, Sichuan, China
- Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, Chengdu, 610041, China
| | - Wanying Luo
- Department of Medical Genetics, West China Second University Hospital, Sichuan University, No. 20, Section 3, Renminnan Road, Chengdu, 610041, Sichuan, China
- Department of Obstetrics and Gynecology, West China Second University Hospital, Sichuan University, Chengdu, 610041, Sichuan, China
- Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, Chengdu, 610041, China
| | - Qiyi Wang
- Department of Medical Genetics, West China Second University Hospital, Sichuan University, No. 20, Section 3, Renminnan Road, Chengdu, 610041, Sichuan, China
- Department of Obstetrics and Gynecology, West China Second University Hospital, Sichuan University, Chengdu, 610041, Sichuan, China
- Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, Chengdu, 610041, China
| | - Zhushu Liu
- Department of Medical Genetics, West China Second University Hospital, Sichuan University, No. 20, Section 3, Renminnan Road, Chengdu, 610041, Sichuan, China
- Department of Obstetrics and Gynecology, West China Second University Hospital, Sichuan University, Chengdu, 610041, Sichuan, China
- Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, Chengdu, 610041, China
| | - He Wang
- Department of Medical Genetics, West China Second University Hospital, Sichuan University, No. 20, Section 3, Renminnan Road, Chengdu, 610041, Sichuan, China
- Department of Obstetrics and Gynecology, West China Second University Hospital, Sichuan University, Chengdu, 610041, Sichuan, China
- Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, Chengdu, 610041, China
| | - Shanling Liu
- Department of Medical Genetics, West China Second University Hospital, Sichuan University, No. 20, Section 3, Renminnan Road, Chengdu, 610041, Sichuan, China
- Department of Obstetrics and Gynecology, West China Second University Hospital, Sichuan University, Chengdu, 610041, Sichuan, China
- Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, Chengdu, 610041, China
| | - Ting Hu
- Department of Medical Genetics, West China Second University Hospital, Sichuan University, No. 20, Section 3, Renminnan Road, Chengdu, 610041, Sichuan, China.
- Department of Obstetrics and Gynecology, West China Second University Hospital, Sichuan University, Chengdu, 610041, Sichuan, China.
- Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, Chengdu, 610041, China.
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O'Connor C, O'Connor E, Leitao S, Barrett S, O'Donoghue K. Clinical practice guidelines for the antenatal management of dichorionic diamniotic twin pregnancies: a systematic review. BMC Pregnancy Childbirth 2023; 23:347. [PMID: 37179347 PMCID: PMC10182673 DOI: 10.1186/s12884-023-05652-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Accepted: 04/27/2023] [Indexed: 05/15/2023] Open
Abstract
OBJECTIVE This review aimed to identify guidelines with recommendations applicable to the antenatal management of dichorionic diamniotic twin pregnancies within high-income countries, appraise their methodological quality, and discuss the similarities and variability across guidelines. METHOD A systematic literature review of electronic databases was performed. Manual searches of guideline repositories and websites of professional organisations were performed to identify additional guidelines. The protocol for this systematic review was registered on PROSPERO (CRD42021248586, 25 June 2021). AGREE II and AGREE-REX tools were applied to assess the quality of eligible guidelines. A narrative and thematic synthesis described and compared the guidelines and their recommendations. RESULTS Twenty-four guidelines were included, from which 483 recommendations were identified across 4 international organisations and 12 countries. Guidelines addressed eight themes and recommendations were classified accordingly: chorionicity and dating (103 recommendations), fetal growth (105 recommendations), termination of pregnancy (12 recommendations), fetal death (13 recommendations), fetal anomalies (65 recommendations), antenatal care (65 recommendations), preterm labour (56 recommendations) and birth (54 recommendations). Guidelines showed significant variability in recommendations, with conflicting recommendations regarding non-invasive preterm testing, definitions surrounding selective fetal growth restriction, screening for preterm labour and the timing of birth. Guidelines lacked a focus on standard antenatal management of DCDA twins, management of discordant fetal anomaly and single fetal demise. CONCLUSIONS Specific guidance for dichorionic diamniotic twins is overall indistinct and access to guidance regarding the antenatal management of these pregnancies is currently difficult. Management of discordant fetal anomaly or single fetal demise needs greater consideration.
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Affiliation(s)
- Caroline O'Connor
- INFANT Research Centre, University College Cork, Cork, Ireland.
- Pregnancy Loss Research Group, Department of Obstetrics & Gynecology, University College Cork, Cork, Ireland.
- Department of Obstetrics and Gynecology, Cork University Maternity Hospital, 5th Floor, Wilton Road, Cork, Ireland.
| | - Emily O'Connor
- INFANT Research Centre, University College Cork, Cork, Ireland
- Pregnancy Loss Research Group, Department of Obstetrics & Gynecology, University College Cork, Cork, Ireland
- National Perinatal Epidemiology Center (NPEC), University College Cork, Cork, Ireland
| | - Sara Leitao
- Pregnancy Loss Research Group, Department of Obstetrics & Gynecology, University College Cork, Cork, Ireland
- National Perinatal Epidemiology Center (NPEC), University College Cork, Cork, Ireland
| | - Shauna Barrett
- Cork University Hospital Library, Cork University Hospital, Cork, Ireland
| | - Keelin O'Donoghue
- INFANT Research Centre, University College Cork, Cork, Ireland
- Pregnancy Loss Research Group, Department of Obstetrics & Gynecology, University College Cork, Cork, Ireland
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Kamath V, Chacko MP, Kamath MS. Non-invasive Prenatal Testing in Pregnancies Following Assisted Reproduction. Curr Genomics 2022; 23:326-336. [PMID: 36778193 PMCID: PMC9878858 DOI: 10.2174/1389202923666220518095758] [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: 12/23/2021] [Revised: 03/17/2022] [Accepted: 04/05/2022] [Indexed: 11/22/2022] Open
Abstract
In the decade since non-invasive prenatal testing (NIPT) was first implemented as a prenatal screening tool, it has gained recognition for its sensitivity and specificity in the detection of common aneuploidies. This review mainly focuses on the emerging role of NIPT in pregnancies following assisted reproductive technology (ART) in the light of current evidence and recommendations. It also deals with the challenges, shortcomings and interpretational difficulties related to NIPT in ART pregnancies, with particular emphasis on twin and vanishing twin pregnancies, which are widely regarded as the Achilles' heel of most pre-natal screening platforms. Future directions for exploration towards improving the performance and extending the scope of NIPT are also addressed.
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Affiliation(s)
- Vandana Kamath
- Department of Cytogenetics, Christian Medical College, Vellore 632004, India
| | - Mary Purna Chacko
- Department of Cytogenetics, Christian Medical College, Vellore 632004, India
| | - Mohan S. Kamath
- Department of Reproductive Medicine and Surgery, Christian Medical College, Vellore 632004, India,Address correspondence to this author at the Department of Reproductive Medicine and Surgery, Christian Medical College, Vellore, Tamil Nadu 632004, India; Tel: 91-416-2283301; E-mail:
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Management of Twin Pregnancies: A Comparative Review of National and International Guidelines. Obstet Gynecol Surv 2021; 75:419-430. [PMID: 32735684 DOI: 10.1097/ogx.0000000000000803] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Importance Twin pregnancies are associated with a higher risk of perinatal mortality and morbidity compared with singleton and require more intensive prenatal care. Objective The aim of this study was to review and compare the recommendations from published guidelines on twin pregnancies. Evidence Acquisition A descriptive review of guidelines from the Royal College of Obstetricians and Gynaecologists, the International Society of Ultrasound in Obstetrics and Gynecology, the Royal Australian and New Zealand College of Obstetricians and Gynaecologists, the National Institute for Health and Care Excellence, the Institute of Obstetricians and Gynaecologists of the Royal College of Physicians of Ireland, the International Federation of Gynecology and Obstetrics, the Society of Obstetricians and Gynaecologists of Canada, and the American College of Obstetricians and Gynecologists on the management of twin pregnancies was conducted. Results All the guidelines highlight the importance of an accurate assessment of chorionicity, amnionicity, and gestational age in the first trimester. They also recommend the performance of nuchal translucency and a detailed anomaly scan. The ultrasound surveillance protocol is similar in all guidelines, that is, every 2 weeks for monochorionic and every 4 weeks for dichorionic twins. On the other hand, there are differences regarding the timing and mode of delivery, especially in monochorionic diamniotic twins, in the definition and management of fetal growth discordance, the use of cervical length to screen for preterm birth, and the timing of corticosteroids' administration. Conclusions The differences in the reviewed guidelines on the management of twin pregnancies highlight the need for an adoption of an international consensus, in order to improve perinatal outcomes of twin pregnancies.
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Lee JY, Kwon JY, Na S, Choe SA, Seol HJ, Kim M, Kim MA, Park CW, Kim K, Ryu HM, Hwang HS, Shim JY. Clinical Practice Guidelines for Prenatal Aneuploidy Screening and Diagnostic Testing from Korean Society of Maternal-Fetal Medicine: (2) Invasive Diagnostic Testing for Fetal Chromosomal Abnormalities. J Korean Med Sci 2021; 36:e26. [PMID: 33496085 PMCID: PMC7834898 DOI: 10.3346/jkms.2021.36.e26] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Accepted: 11/06/2020] [Indexed: 11/20/2022] Open
Abstract
The Korean Society of Maternal Fetal Medicine proposed the first Korean guideline on prenatal aneuploidy screening and diagnostic testing, in April 2019. The clinical practice guideline (CPG) was developed for Korean women using an adaptation process based on good-quality practice guidelines, previously developed in other countries, on prenatal screening and invasive diagnostic testing for fetal chromosome abnormalities. We reviewed current guidelines and developed a Korean CPG on invasive diagnostic testing for fetal chromosome abnormalities according to the adaptation process. Recommendations for selected 11 key questions are: 1) Considering the increased risk of fetal loss in invasive prenatal diagnostic testing for fetal genetic disorders, it is not recommended for all pregnant women aged over 35 years. 2) Because early amniocentesis performed before 14 weeks of pregnancy increases the risk of fetal loss and malformation, chorionic villus sampling (CVS) is recommended for pregnant women who will undergo invasive prenatal diagnostic testing for fetal genetic disorders in the first trimester of pregnancy. However, CVS before 9 weeks of pregnancy also increases the risk of fetal loss and deformity. Thus, CVS is recommended after 9 weeks of pregnancy. 3) Amniocentesis is recommended to distinguish true fetal mosaicism from confined placental mosaicism. 4) Anti-immunoglobulin should be administered within 72 hours after the invasive diagnostic testing. 5) Since there is a high risk of vertical transmission, an invasive prenatal diagnostic testing is recommended according to the clinician's discretion with consideration of the condition of the pregnant woman. 6) The use of antibiotics is not recommended before or after an invasive diagnostic testing. 7) The chromosomal microarray test as an alternative to the conventional cytogenetic test is not recommended for all pregnant women who will undergo an invasive diagnostic testing. 8) Amniocentesis before 14 weeks of gestation is not recommended because it increases the risk of fetal loss and malformation. 9) CVS before 9 weeks of gestation is not recommended because it increases the risk of fetal loss and malformation. 10) Although the risk of fetal loss associated with invasive prenatal diagnostic testing (amniocentesis and CVS) may vary based on the proficiency of the operator, the risk of fetal loss due to invasive prenatal diagnostic testing is higher in twin pregnancies than in singleton pregnancies. 11) When a monochorionic twin is identified in early pregnancy and the growth and structure of both fetuses are consistent, an invasive prenatal diagnostic testing can be performed on one fetus alone. However, an invasive prenatal diagnostic testing is recommended for each fetus in cases of pregnancy conceived via in vitro fertilization, or in cases in which the growth of both fetuses differs, or in those in which at least one fetus has a structural abnormality. The guidelines were established and approved by the Korean Academy of Medical Sciences. This guideline is revised and presented every 5 years.
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Affiliation(s)
- Ji Yeon Lee
- Department of Obstetrics and Gynecology, CHA Bundang Medical Center, CHA University School of Medicine, Seongnam, Korea
| | - Ji Young Kwon
- Department of Obstetrics and Gynecology, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Sunghun Na
- Department of Obstetrics and Gynecology, Kangwon National University Hospital, Kangwon National University School of Medicine, Chuncheon, Korea
| | - Seung Ah Choe
- Department of Preventive Medicine, Korea University College of Medicine, Seoul, Korea
| | - Hyun Joo Seol
- Department of Obstetrics and Gynecology, Kyung Hee University Hospital at Gangdong, College of Medicine, Kyung Hee University, Seoul, Korea
| | - Minhyoung Kim
- Department of Obstetrics and Gynecology, MizMedi Hospital, Seoul, Korea
| | - Min A Kim
- Department of Obstetrics and Gynecology, Gangnam Severance Hospital, Institute of Women's Life Medical Science, Yonsei University College of Medicine, Seoul, Korea
| | - Chan Wook Park
- Department of Obstetrics and Gynecology, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea
| | | | - Hyun Mee Ryu
- Department of Obstetrics and Gynecology, CHA Bundang Medical Center, CHA University School of Medicine, Seongnam, Korea
| | - Han Sung Hwang
- Department of Obstetrics and Gynecology, Research Institute of Medical Science, Konkuk University Medical Center, Konkuk University School of Medicine, Seoul, Korea.
| | - Jae Yoon Shim
- Mirae & Heemang Obstetrics and Gynecology Clinic, Seoul, Korea.
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Gagliardi L, Rusconi F, Reichman B, Adams M, Modi N, Lehtonen L, Kusuda S, Vento M, Darlow BA, Bassler D, Isayama T, Norman M, Håkansson S, Lee SK, Lui K, Yang J, Shah P. Neonatal outcomes of extremely preterm twins by sex pairing: an international cohort study. Arch Dis Child Fetal Neonatal Ed 2021; 106:17-24. [PMID: 32451356 DOI: 10.1136/archdischild-2020-318832] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Revised: 04/09/2020] [Accepted: 04/23/2020] [Indexed: 11/04/2022]
Abstract
OBJECTIVE Infant boys have worse outcomes than girls. In twins, the 'male disadvantage' has been reported to extend to female co-twins via a 'masculinising' effect. We studied the association between sex pairing and neonatal outcomes in extremely preterm twins. DESIGN Retrospective cohort study SETTING: Eleven countries participating in the International Network for Evaluating Outcomes of Neonates. PATIENTS Liveborn twins admitted at 23-29 weeks' gestation in 2007-2015. MAIN OUTCOME MEASURES We examined in-hospital mortality, grades 3/4 intraventricular haemorrhage or cystic periventricular leukomalacia (IVH/PVL), bronchopulmonary dysplasia (BPD), retinopathy of prematurity requiring treatment and a composite outcome (mortality or any of the outcomes above). RESULTS Among 20 924 twins, 38% were from male-male pairs, 32% were from female-female pairs and 30% were sex discordant. We had no information on chorionicity. Girls with a male co-twin had lower odds of mortality, IVH/PVL and the composite outcome than girl-girl pairs (reference group): adjusted OR (aOR) (95% CI) 0.79 (0.68 to 0.92), 0.83 (0.72 to 0.96) and 0.88 (0.79 to 0.98), respectively. Boys with a female co-twin also had lower odds of mortality: aOR 0.86 (0.74 to 0.99). Boys from male-male pairs had highest odds of BPD and composite outcome: aOR 1.38 (1.24 to 1.52) and 1.27 (1.16 to 1.39), respectively. CONCLUSIONS Sex-related disparities in outcomes exist in extremely preterm twins, with girls having lower risks than boys and opposite-sex pairs having lower risks than same-sex pairs. Our results may help clinicians in assessing risk in this large segment of extremely preterm infants.
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Affiliation(s)
- Luigi Gagliardi
- Division of Neonatology and Pediatrics, Ospedale Versilia, Viareggio, Azienda USL Toscana Nord Ovest, Italy
| | - Franca Rusconi
- Unit of Epidemiology, Anna Meyer Children's University Hospital and Regional Health Agency, Florence, Italy
| | - Brian Reichman
- Gertner Institute for Epidemiology and Health Policy Research, Sheba Medical Center, Tel Hashomer, Israel
| | - Mark Adams
- Department of Neonatology, University Hospital Zurich and University of Zurich, Zurich, Switzerland
| | - Neena Modi
- UK Neonatal Collaborative, Neonatal Data Analysis Unit, Section of Neonatal Medicine, Department of Medicine, Imperial College London, London, UK
| | - Liisa Lehtonen
- Department of Pediatrics and Adolescent Medicine, Turku University Hospital and Department of Clinical Medicine, University of Turku0, Turku, Finland
| | - Satoshi Kusuda
- Neonatal Research Network Japan, Maternal and Perinatal Center, Tokyo Women's Medical University, Tokyo, Japan
| | - Maximo Vento
- Division of Neonatology, Health Research Institute La Fe, Valencia, Spain
| | - Brian A Darlow
- Department of Paediatrics, University of Otago Christchurch, Canterbury, New Zealand
| | - Dirk Bassler
- Department of Neonatology, University Hospital Zurich and University of Zurich, Zurich, Switzerland
| | - Tetsuya Isayama
- Division of Neonatology, National Center for Child Health and Development, Tokyo, Japan
| | - Mikael Norman
- Department of Neonatal Medicine, Karolinska University Hospital, Stockholm, Sweden
- Department of Clinical Science, Intervention and Technology, Karolinska Institutet, Stockholm, Sweden
| | - Stellan Håkansson
- Department of Clinical Science/Pediatrics, Umea University, Umea, Sweden
| | - Shoo K Lee
- Department of Pediatrics, Mount Sinai Hospital, Toronto, Ontario, Canada
- Department of Pediatrics, University of Toronto, Toronto, Ontario, Canada
- Maternal-infant Care Research Centre, Mount Sinai Hospital, Toronto, Ontario, Canada
| | - Kei Lui
- Royal Hospital for Women, National Perinatal Epidemiology and Statistic Unit, 0, Randwick, New South Wales, Australia
| | - Junmin Yang
- Maternal-infant Care Research Centre, Mount Sinai Hospital, Toronto, Ontario, Canada
| | - Prakeshkumar Shah
- Department of Pediatrics, Mount Sinai Hospital, Toronto, Ontario, Canada
- Department of Pediatrics, University of Toronto, Toronto, Ontario, Canada
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Palomaki GE, Chiu RWK, Pertile MD, Sistermans EA, Yaron Y, Vermeesch JR, Vora NL, Best RG, Wilkins-Haug L. International Society for Prenatal Diagnosis Position Statement: cell free (cf)DNA screening for Down syndrome in multiple pregnancies. Prenat Diagn 2020; 41:1222-1232. [PMID: 33016373 DOI: 10.1002/pd.5832] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Accepted: 09/27/2020] [Indexed: 12/14/2022]
Affiliation(s)
- Glenn E Palomaki
- Department of Pathology and Laboratory Medicine, Women & Infants Hospital and the Alpert Medical School at Brown University, Providence, Rhode Island, USA
| | - Rossa W K Chiu
- Department of Chemical Pathology, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Mark D Pertile
- Victorian Clinical Genetics Services (VCGS), Murdoch Children's Research Institute, Melbourne, Victoria, Australia
| | - Erik A Sistermans
- Department of Clinical Genetics, Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
| | - Yuval Yaron
- Prenatal Genetic Diagnosis Unit, Genetic Institute, Tel Aviv Medical Center, Faculty of Medicine Tel Aviv University, Tel Aviv, Israel
| | | | - Neeta L Vora
- Department of Obstetrics and Gynecology, Division of Maternal-Fetal Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Robert G Best
- University of South Carolina SOM Greenville, Greenville, South Carolina, USA
| | - Louise Wilkins-Haug
- Division of Maternal Fetal Medicine and Reproductive Genetics, Department of Obstetrics and Gynecology, Brigham and Women's Hospital, Boston, Massachusetts, USA
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Désilets V, De Bie I, Audibert F. No. 363-Investigation and Management of Non-immune Fetal Hydrops. JOURNAL OF OBSTETRICS AND GYNAECOLOGY CANADA 2019; 40:1077-1090. [PMID: 30103882 DOI: 10.1016/j.jogc.2017.12.011] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
OBJECTIVE To describe the current investigation and management of non-immune fetal hydrops with a focus on treatable or recurring etiologies. OUTCOMES To provide better counselling and management in cases of prenatally diagnosed non-immune hydrops. EVIDENCE Published literature was retrieved through searches of PubMed or MEDLINE, CINAHL, and The Cochrane Library in 2017 using key words (non-immune hydrops fetalis, fetal hydrops, fetal therapy, fetal metabolism). Results were restricted to systematic reviews, randomized controlled trials/controlled clinical trials, observational studies, and significant case reports. Additional publications were identified from the bibliographies of these articles. There were no date or language restrictions. Searches were updated on a regular basis and incorporated in the guideline to September 2017. Grey (unpublished) literature was identified through searching the websites of health technology assessment and health technology-related agencies, clinicalpractice guideline collections, clinical trial registries, and national and international medical specialty societies. BENEFITS, HARMS, AND COSTS These guidelines educate readers about the causes of non-immune fetal hydrops and its prenatal counselling and management. It also provides a standardized approach to non-immune fetal hydrops, emphasizing the search for prenatally treatable conditions and recurrent genetic etiologies. VALUES The quality of evidence in this document was rated using the criteria described in the Report of the Canadian Task Force on Preventive Health Care. RECOMMENDATIONS
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Audibert F, De Bie I, Johnson JA, Okun N, Wilson RD, Armour C, Chitayat D, Kim R. No. 348-Joint SOGC-CCMG Guideline: Update on Prenatal Screening for Fetal Aneuploidy, Fetal Anomalies, and Adverse Pregnancy Outcomes. JOURNAL OF OBSTETRICS AND GYNAECOLOGY CANADA 2019; 39:805-817. [PMID: 28859766 DOI: 10.1016/j.jogc.2017.01.032] [Citation(s) in RCA: 72] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
OBJECTIVE To review the available prenatal screening options in light of the recent technical advances and to provide an update of previous guidelines in the field of prenatal screening. INTENDED USERS Health care providers involved in prenatal screening, including general practitioners, obstetricians, midwives, maternal fetal medicine specialists, geneticists, and radiologists. TARGET POPULATION All pregnant women receiving counselling and providing informed consent for prenatal screening. EVIDENCE Published literature was retrieved through searches of Medline, PubMed, and the Cochrane Library in and prior to March 2016 using an appropriate controlled vocabulary (prenatal diagnosis, amniocentesis, chorionic villi sampling, non-invasive prenatal screening) and key words (prenatal screening, prenatal genetic counselling). Results were restricted to systematic reviews, randomized control trials/controlled clinical trials, and observational studies written in English and published from January 1985 to May 2016. Searches were updated on a regular basis and incorporated in the guideline. Grey (unpublished) literature was identified through searching the websites of health technology assessment and health technology-related agencies, clinical practice guideline collections, clinical trial registries, and national and international medical speciality societies. GUIDELINE UPDATE Evidence will be reviewed 5 years after publication to determine whether all or part of the guideline should be updated. However, if important new evidence is published prior to the 5-year cycle, the review process may be accelerated for a more rapid update of some recommendations.
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Ong J, Gosavi A, Biswas A, Choolani M. Trisomy 21 in both fetuses in a DCDA twin pregnancy. BMJ Case Rep 2019; 12:12/4/e227608. [PMID: 30988104 DOI: 10.1136/bcr-2018-227608] [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: 11/04/2022] Open
Abstract
A woman's chances of having a child with Down syndrome increases with age. By age 40, the risk of conceiving a child with Down syndrome is about 1 in 100. We report a rare case of dizygotic dichorionic diamniotic twin pregnancy conceived via in vitro fertilisation, with both twins having trisomy 21. Both fetuses were independently detected to be at high risk of autosomal trisomy, initially via first-trimester screening and subsequently via invasive definitive diagnostic tests (ie, chorionic villus sampling and amniocentesis).Diagnosis of trisomy 21 has to be made via initial non-invasive prenatal screening, followed by further rigorous and accurate invasive pregnancy testing for confirmation. The gravity of the results necessitates high detection rates and high specificity of prenatal screening tests. Management of the patient must be multidisciplinary and supportive in nature, involving extensive and non-directive pregnancy counselling and management, genetic counselling and management of psychological distress.
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Affiliation(s)
- Jiawen Ong
- Obstetrics and Gynaecology, KK Women's and Children's Hospital, Singapore
| | - Arundhati Gosavi
- Obstetrics and Gynecology, National University Hospital, Singapore
| | - Arijit Biswas
- Obstetrics and Gynecology, National University Hospital, Singapore
| | - Mahesh Choolani
- Obstetrics and Gynecology, National University Hospital, Singapore
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Townsend R, Khalil A. Ultrasound surveillance in twin pregnancy: An update for practitioners. ULTRASOUND (LEEDS, ENGLAND) 2018; 26:193-205. [PMID: 30479634 PMCID: PMC6243450 DOI: 10.1177/1742271x18794013] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2018] [Accepted: 06/28/2018] [Indexed: 01/31/2023]
Abstract
Ultrasound has revolutionised the management of multiple pregnancies and their complications. Increasing frequency of twin pregnancies mandates familiarity of all clinicians with the relevant pathologies and evidence-based surveillance and management protocols for their care. In this review, we summarise the latest evidence relating to ultrasound surveillance of twin pregnancies including first trimester assessment and screening, growth surveillance and the detection and management of the complications of monochorionic pregnancies including twin-to-twin-transfusion syndrome, selective fetal growth restriction, twin reversed arterial perfusion sequence and conjoined twinning.
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Affiliation(s)
- R Townsend
- Fetal Medicine Unit, St. George's University of London, London, UK
| | - A Khalil
- Fetal Medicine Unit, St. George's University of London, London, UK
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Désilets V, De Bie I, Audibert F. N° 363 - Évaluation et prise en charge de l'anasarque fœtoplacentaire non immune. JOURNAL OF OBSTETRICS AND GYNAECOLOGY CANADA 2018; 40:1091-1107. [PMID: 29980442 DOI: 10.1016/j.jogc.2018.06.005] [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: 11/20/2022]
Abstract
OBJECTIF Décrire les méthodes actuelles d'évaluation et de prise en charge de l'anasarque fœtoplacentaire non immune en mettant l'accent sur les étiologies traitables ou récurrentes. RéSULTATS: Offrir de meilleurs services de conseil et de prise en charge en cas d'anasarque fœtoplacentaire non immune diagnostiquée en période prénatale. DONNéES: La littérature publiée a été récupérée au moyen de recherches menées dans PubMed, MEDLINE, CINAHL, et la Bibliothèque Cochrane en 2017 à l'aide de mots-clés (« non-immune hydrops fetalis », « fetal hydrops », « fetal therapy », « fetal metabolism »). Les articles retenus portaient sur des revues systématiques, des essais cliniques contrôlés, randomisés ou non, des études observationnelles et des études de cas importantes. D'autres publications ont été repérées dans les bibliographies de ces articles. Aucune restriction de date ou de langue n'a été employée. Les recherches ont été mis à jour régulièrement, et les résultats ont été incorporés à la directive clinique jusqu'en septembre 2017. Nous avons également tenu compte de la littérature grise (non publiée) trouvée sur les sites Web d'organismes d'évaluation des technologies de la santé et d'autres organismes liés aux technologies de la santé, dans des collections de directives cliniques et des registres d'essais cliniques, et obtenue auprès d'associations nationales et internationales de médecins spécialistes. AVANTAGES, INCONVéNIENTS ET COûTS: La présente directive clinique renseigne les lecteurs sur les causes de l'anasarque fœtoplacentaire non immune ainsi que sur son évaluation et sa prise en charge. Elle propose également une approche standardisée d'évaluation et de prise en charge, et met l'accent sur la recherche des conditions traitables en période prénatale et des étiologies génétiques récurrentes. VALEURS La qualité des données probantes a été évaluée en fonction des critères décrits dans le rapport du Groupe d'étude canadien sur les soins de santé préventifs. RECOMMANDATIONS.
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Key Words
- ACM, artère cérébrale moyenne
- ADN, acide désoxyribonucléique
- AFNI, anasarque fœtoplacentaire non immune
- AG, âge gestationnel
- CMV, cytomégalovirus
- ELISA, essai immuno-enzymatique
- FISH, hybridation in situ fluorescente
- FSC, formule sanguine complète
- Hb H, hémoglobine H
- Hb, hémoglobine
- IgG, immunoglobuline G
- IgM, immunoglobuline M
- MPS, mucopolysaccharidose
- QF-PCR, réaction en chaîne par polymérase fluorescente quantitative
- RT-PCR, réaction en chaîne par polymérase en temps réel
- SOGC, Société des obstétriciens et gynécologues du Canada
- TORCH, toxoplasmose, rubéole, cytomégalovirus, herpès simplex
- VIH, virus de l'immunodéficience humaine
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Wilson RD. Woman's Pre-Conception Evaluation: Genetic and Fetal Risk Considerations for Counselling and Informed Choice. JOURNAL OF OBSTETRICS AND GYNAECOLOGY CANADA 2018; 40:935-949. [DOI: 10.1016/j.jogc.2017.07.024] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2017] [Revised: 07/26/2017] [Accepted: 07/26/2017] [Indexed: 12/30/2022]
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Milan M, Mateu E, Blesa D, Clemente-Ciscar M, Simon C. Fetal sex determination in twin pregnancies using cell free fetal DNA analysis. Prenat Diagn 2018; 38:578-584. [PMID: 29683524 DOI: 10.1002/pd.5274] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Revised: 04/10/2018] [Accepted: 04/15/2018] [Indexed: 12/16/2022]
Abstract
OBJECTIVE(S) We sought to develop an accurate sex classification method in twin pregnancies using data obtained from a standard commercial non-invasive prenatal test. STUDY DESIGN A total of 706 twin pregnancies were included in this retrospective analytical data study. Normalized chromosome values for chromosomes X and Y were used and adapted into a sex-score to predict fetal sex in each fetus, and results were compared with the clinical outcome at birth. RESULTS Outcome information at birth for sex chromosomes was available for 232 twin pregnancies. From these, a total of 173 twin pregnancies with a Y chromosome identified in non-invasive pregnancy testing were used for the development of a predictive model. Global accuracy for sex classification in the testing set with 51 samples was 0.98 (95% confidence interval [0.90,0.99]), with a specificity and sensitivity of 1 (95% confidence interval [0.82,1.00]) and 0.97 (95% confidence interval [0.84,0.99]), respectively. CONCLUSION While non-invasive prenatal testing is a screening method and confirmatory results must be obtained by ultrasound or genetic diagnosis, the sex-score determination presented herein offers an accurate and useful approach to characterizing fetus sex in twin pregnancies in a non-invasive manner early on in pregnancy.
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Affiliation(s)
| | | | | | | | - Carlos Simon
- Instituto Universitario IVI, Instituto de Investigación Sanitaria Hospital Clinico de Valencia INCLIVA, Valencia, Spain
- Department of Obstetrics and Gynecology, School of Medicine, Valencia University, Valencia, Spain
- Fundación Igenomix, Valencia, Spain
- Department of Obstetrics and Gynecology, School of Medicine, Stanford University, Stanford, CA, USA
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Audibert F, De Bie I, Johnson JA, Okun N, Wilson RD, Armour C, Chitayat D, Kim R. N o 348-Directive clinique de la SOGC et du CCGM : mise à jour sur le dépistage prénatal de l’aneuploïdie fœtale, des anomalies fœtales et des issues défavorables de la grossesse. JOURNAL OF OBSTETRICS AND GYNAECOLOGY CANADA 2017; 39:818-832. [DOI: 10.1016/j.jogc.2017.05.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Fosler L, Winters P, Jones KW, Curnow KJ, Sehnert AJ, Bhatt S, Platt LD. Aneuploidy screening by non-invasive prenatal testing in twin pregnancy. ULTRASOUND IN OBSTETRICS & GYNECOLOGY : THE OFFICIAL JOURNAL OF THE INTERNATIONAL SOCIETY OF ULTRASOUND IN OBSTETRICS AND GYNECOLOGY 2017; 49:470-477. [PMID: 27194226 PMCID: PMC5396416 DOI: 10.1002/uog.15964] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/20/2016] [Revised: 05/03/2016] [Accepted: 05/13/2016] [Indexed: 06/05/2023]
Abstract
OBJECTIVES To describe our experience with non-invasive prenatal testing (NIPT) in twin pregnancy. METHODS Two sets of maternal blood samples from twin pregnancies were analyzed at our laboratory using NIPT: 115 stored samples from pregnancies with known outcome (Clinical Study A) and 487 prospectively collected samples for which outcomes were requested from providers (Clinical Study B). NIPT was used to screen for the presence of fetal aneuploidy on chromosomes 13, 18, 21, X and Y in all cases, and results were compared with outcomes when known. RESULTS In Clinical Study A, all 115 samples were classified correctly by NIPT: three cases of trisomy 21 (one fetus affected), one of monochorionic trisomy 18 (both fetuses affected) and 111 euploid. In Clinical Study B, a NIPT result was reported for 479 (98.4%) of the 487 samples. Aneuploidy was detected or suspected in nine (1.9%) cases: seven cases of trisomy 21 detected, one case of trisomy 21 suspected and one case with trisomy 21 detected and trisomy 18 suspected. Information on aneuploidy outcome was available for 171 (35.7%) cases in Clinical Study B. Of the nine cases with aneuploidy detected or suspected, six were confirmed to be a true positive in at least one twin based on karyotype or birth outcome and two were suspected to be concordant based on ultrasound findings; the one known discordant result was for the aneuploidy suspected case. No false negatives were reported. CONCLUSION NIPT performed well in the detection of trisomy 21 in twin pregnancy, with a combined false-positive frequency for trisomies 13, 18 and 21 of 0% for Clinical Study A and 0.2% for Clinical Study B. © 2016 Illumina. 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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MESH Headings
- Adult
- Aneuploidy
- Chromosomes, Human, Pair 13/genetics
- Chromosomes, Human, Pair 18/genetics
- Chromosomes, Human, Pair 21/genetics
- Chromosomes, Human, X/genetics
- Chromosomes, Human, Y/genetics
- Female
- Genetic Testing/methods
- Humans
- Maternal Age
- Middle Aged
- Pregnancy
- Pregnancy, Twin
- Prenatal Diagnosis/methods
- Prospective Studies
- Young Adult
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Affiliation(s)
| | | | | | | | | | | | - L. D. Platt
- David Geffen School of MedicineUniversity of California Los AnglesLos AngelesCAUSA
- Center for Fetal Medicine and Women's UltrasoundLos AngelesCAUSA
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Ghi T, Sotiriadis A, Raine-Fenning N. Reply. ULTRASOUND IN OBSTETRICS & GYNECOLOGY : THE OFFICIAL JOURNAL OF THE INTERNATIONAL SOCIETY OF ULTRASOUND IN OBSTETRICS AND GYNECOLOGY 2017; 49:415-417. [PMID: 28266157 DOI: 10.1002/uog.17376] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Affiliation(s)
- T Ghi
- Department of Obstetrics and Gynecology, University of Parma, via Gramsci n 14 Parma, Parma 43126, Italy
| | | | - N Raine-Fenning
- Division of Child Health, Obstetrics and Gynaecology, School of Medicine, University of Nottingham, Nottingham, UK
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Désilets V, Audibert F. Exploration et prise en charge de l'anasarque fœtoplacentaire non immune. JOURNAL OF OBSTETRICS AND GYNAECOLOGY CANADA 2017; 38:S311-S325. [PMID: 28063543 DOI: 10.1016/j.jogc.2016.09.041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Wilson RD, Gagnon A, Audibert F, Campagnolo C, Carroll J. Interventions et techniques de diagnostic prénatal visant l'obtention d'un prélèvement fœtal à des fins diagnostiques : Risques et avantages pour la mère et le fœtus. JOURNAL OF OBSTETRICS AND GYNAECOLOGY CANADA 2017; 38:S688-S703. [PMID: 28063574 DOI: 10.1016/j.jogc.2016.09.071] [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: 11/26/2022]
Abstract
OBJECTIF Offrir aux fournisseurs de soins de maternité et à leurs patientes des lignes directrices factuelles contemporaines en ce qui concerne les services de counseling traitant des risques et des avantages maternels propres à la tenue des interventions diagnostiques prénatales orientées par échographie (et/ou des techniques permettant l'établissement d'un diagnostic génétique) nécessaires dans les cas où il a été établi pendant la période prénatale que la grossesse serait exposée à des risques, ainsi qu'en ce qui concerne la prise de décisions subséquentes quant à la prise en charge de la grossesse (questions abordant des aspects tels que le niveau du fournisseur de soins obstétricaux, la surveillance prénatale, le lieu où devraient se dérouler les soins et l'accouchement, et la décision de poursuivre ou d'interrompre la grossesse). La présente directive clinique se limite aux services de counseling traitant des risques et des avantages maternels, et aux décisions en matière de prise en charge de la grossesse pour les femmes qui nécessitent (ou qui envisagent) la mise en œuvre d'une intervention ou d'une technique effractive orientée par échographie aux fins de l'établissement d'un diagnostic prénatal. POPULATION DE PATIENTES Femmes enceintes identifiées, à la suite de la mise en œuvre de protocoles établis de dépistage prénatal (taux sériques maternels ± imagerie, résultats d'analyse de l'ADN acellulaire indiquant des risques élevés, résultats anormaux au moment de l'imagerie fœtale diagnostique ou antécédents familiaux de troubles héréditaires), comme étant exposées à un risque accru d'anomalie génétique fœtale. Ces femmes pourraient nécessiter ou demander des services de counseling au sujet des risques et des avantages pour la grossesse de la tenue d'une intervention effractive orientée par échographie visant à déterminer l'étiologie, le diagnostic, et/ou la pathologie de possibles anomalies fœtales. RéSULTATS: La littérature publiée a été récupérée par l'intermédiaire de recherches menées dans Medline, PubMed et The Cochrane Library jusqu'en juin 2014 au moyen d'un vocabulaire contrôlé (« prenatal diagnosis », « amniocentesis », « chorionic villi sampling », « cordocentesis ») et de mots clés (« prenatal screening », « prenatal genetic counselling », « post-procedural pregnancy loss rate ») appropriés. Les résultats ont été restreints aux analyses systématiques, aux études observationnelles et aux essais comparatifs randomisés / essais cliniques comparatifs publiés en anglais entre janvier 1985 et juin 2014. Les recherches ont été mises à jour de façon régulière et intégrées à la directive clinique jusqu'en juin 2014. La littérature grise (non publiée) a été identifiée par l'intermédiaire de recherches menées dans les sites Web d'organismes s'intéressant à l'évaluation des technologies dans le domaine de la santé et d'organismes connexes, dans des collections de directives cliniques, dans des registres d'essais cliniques et auprès de sociétés de spécialité médicale nationales et internationales. VALEURS La qualité des résultats a été évaluée au moyen des critères décrits dans le rapport du Groupe d'étude canadien sur les soins de santé préventifs (Tableau 1). AVANTAGES, DéSAVANTAGES ET COûTS: Consentement éclairé de la patiente, transfert des connaissances, évaluation du risque génétique prénatal, soulagement de l'anxiété, création d'anxiété, défense des droits, compréhension du dépistage fœtal, limites du dépistage fœtal, choix en matière de prise en charge de la grossesse, complication de la grossesse ou fausse couche, soins opportuns et améliorés pour l'accouchement d'un enfant présentant une morbidité reconnue. RECOMMANDATIONS.
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Murdoch B, Ravitsky V, Ogbogu U, Ali-Khan S, Bertier G, Birko S, Bubela T, De Beer J, Dupras C, Ellis M, Granados Moreno P, Joly Y, Kamenova K, Master Z, Marcon A, Paulden M, Rousseau F, Caulfield T. Non-invasive Prenatal Testing and the Unveiling of an Impaired Translation Process. JOURNAL OF OBSTETRICS AND GYNAECOLOGY CANADA 2017; 39:10-17. [DOI: 10.1016/j.jogc.2016.09.004] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2016] [Accepted: 08/29/2016] [Indexed: 12/15/2022]
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Ghi T, Sotiriadis A, Calda P, Da Silva Costa F, Raine-Fenning N, Alfirevic Z, McGillivray G. ISUOG Practice Guidelines: invasive procedures for prenatal diagnosis. ULTRASOUND IN OBSTETRICS & GYNECOLOGY : THE OFFICIAL JOURNAL OF THE INTERNATIONAL SOCIETY OF ULTRASOUND IN OBSTETRICS AND GYNECOLOGY 2016; 48:256-268. [PMID: 27485589 DOI: 10.1002/uog.15945] [Citation(s) in RCA: 75] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2016] [Accepted: 04/15/2016] [Indexed: 06/06/2023]
Affiliation(s)
- T Ghi
- Department of Obstetrics and Gynecology, University of Parma, Parma, Italy
| | - A Sotiriadis
- Department of Obstetrics and Gynecology, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - P Calda
- Department of Obstetrics and Gynecology, Charles University in Prague, First Faculty of Medicine and General Teaching Hospital, Prague, Czech Republic
| | - F Da Silva Costa
- Monash Ultrasound for Women and Perinatal Services, Monash Medical Centre, Melbourne, Victoria, Australia
| | - N Raine-Fenning
- Division of Child Health, Obstetrics and Gynaecology, School of Medicine, University of Nottingham, Nottingham, UK - Nurture Fertility, The Fertility Partnership
| | - Z Alfirevic
- Department of Women's and Children's Health, University of Liverpool, Liverpool, UK
| | - G McGillivray
- Victorian Clinical Genetics Services, Mercy Hospital for Women, Murdoch Children's Research Institute, Melbourne, Australia
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Marceau K, McMaster MTB, Smith TF, Daams JG, van Beijsterveldt CEM, Boomsma DI, Knopik VS. The Prenatal Environment in Twin Studies: A Review on Chorionicity. Behav Genet 2016; 46:286-303. [PMID: 26944881 PMCID: PMC4858569 DOI: 10.1007/s10519-016-9782-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2015] [Accepted: 01/01/2016] [Indexed: 03/26/2024]
Abstract
A literature search was conducted to identify articles examining the association of chorionicity (e.g., whether twins share a single chorion and thus placenta or have separate chorions/placentas) and genetics, psychiatry/behavior, and neurological manifestations in humans twins and higher-order multiples. The main aim was to assess how frequently chorionicity has been examined in relation to heritability estimates, and to assess which phenotypes may be most sensitive to, or affected by, bias in heritability estimates because of chorionicity. Consistent with the theory that some chorionicity effects could lead to overestimation and others to underestimation of heritability, there were instances of each across the many phenotypes reviewed. However, firm conclusions should not be drawn since some of the outcomes were only examined in one or few studies and often sample sizes were small. While the evidence for bias due to chorionicity was mixed or null for many outcomes, results do, however, consistently suggest that heritability estimates are underestimated for measures of birth weight and early growth when chorionicity is not taken into account.
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Affiliation(s)
- Kristine Marceau
- />Division of Behavioral Genetics, Department of Psychiatry, Rhode Island Hospital, Providence, RI USA
- />Center for Alcohol and Addiction Studies, Brown University, Providence, RI USA
- />Division of Behavioral Genetics, Coro West Suite 204, 1 Hoppin St, Providence, RI 02903 USA
| | - Minni T. B. McMaster
- />EMGO Institute for Health and Care Research, VU University, Amsterdam, The Netherlands
| | - Taylor F. Smith
- />Division of Behavioral Genetics, Department of Psychiatry, Rhode Island Hospital, Providence, RI USA
- />Department of Psychology and Child Development, California Polytechnic State University, San Luis Obispo, CA USA
| | - Joost G. Daams
- />Academic Medical Center, Medical Library, University of Amsterdam, Amsterdam, The Netherlands
| | | | - Dorret I. Boomsma
- />EMGO Institute for Health and Care Research, VU University, Amsterdam, The Netherlands
| | - Valerie S. Knopik
- />Division of Behavioral Genetics, Department of Psychiatry, Rhode Island Hospital, Providence, RI USA
- />Department of Psychiatry and Human Behavior, Brown University, Providence, RI USA
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Wilson RD, Gagnon A, Audibert F, Campagnolo C, Carroll J, Wilson RD, Audibert F, Brock JA, Campagnolo C, Carroll J, Chong K, Gagnon A, Johnson JA, MacDonald W, Okun N, Pastuck M, Vallee-Pouliot K. Prenatal Diagnosis Procedures and Techniques to Obtain a Diagnostic Fetal Specimen or Tissue: Maternal and Fetal Risks and Benefits. JOURNAL OF OBSTETRICS AND GYNAECOLOGY CANADA 2015; 37:656-668. [DOI: 10.1016/s1701-2163(15)30205-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Bioinformatics analysis of circulating cell-free DNA sequencing data. Clin Biochem 2015; 48:962-75. [PMID: 25966961 DOI: 10.1016/j.clinbiochem.2015.04.022] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2014] [Revised: 03/30/2015] [Accepted: 04/29/2015] [Indexed: 12/18/2022]
Abstract
The discovery of cell-free DNA molecules in plasma has opened up numerous opportunities in noninvasive diagnosis. Cell-free DNA molecules have become increasingly recognized as promising biomarkers for detection and management of many diseases. The advent of next generation sequencing has provided unprecedented opportunities to scrutinize the characteristics of cell-free DNA molecules in plasma in a genome-wide fashion and at single-base resolution. Consequently, clinical applications of circulating cell-free DNA analysis have not only revolutionized noninvasive prenatal diagnosis but also facilitated cancer detection and monitoring toward an era of blood-based personalized medicine. With the remarkably increasing throughput and lowering cost of next generation sequencing, bioinformatics analysis becomes increasingly demanding to understand the large amount of data generated by these sequencing platforms. In this Review, we highlight the major bioinformatics algorithms involved in the analysis of cell-free DNA sequencing data. Firstly, we briefly describe the biological properties of these molecules and provide an overview of the general bioinformatics approach for the analysis of cell-free DNA. Then, we discuss the specific upstream bioinformatics considerations concerning the analysis of sequencing data of circulating cell-free DNA, followed by further detailed elaboration on each key clinical situation in noninvasive prenatal diagnosis and cancer management where downstream bioinformatics analysis is heavily involved. We also discuss bioinformatics analysis as well as clinical applications of the newly developed massively parallel bisulfite sequencing of cell-free DNA. Finally, we offer our perspectives on the future development of bioinformatics in noninvasive diagnosis.
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Huang X, Zheng J, Chen M, Zhao Y, Zhang C, Liu L, Xie W, Shi S, Wei Y, Lei D, Xu C, Wu Q, Guo X, Shi X, Zhou Y, Liu Q, Gao Y, Jiang F, Zhang H, Su F, Ge H, Li X, Pan X, Chen S, Chen F, Fang Q, Jiang H, Lau TK, Wang W. Noninvasive prenatal testing of trisomies 21 and 18 by massively parallel sequencing of maternal plasma DNA in twin pregnancies. Prenat Diagn 2014; 34:335-40. [PMID: 24357023 DOI: 10.1002/pd.4303] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2013] [Revised: 11/04/2013] [Accepted: 12/12/2013] [Indexed: 12/13/2022]
Abstract
OBJECTIVE The objective of this study is to assess the performance of noninvasive prenatal testing for trisomies 21 and 18 on the basis of massively parallel sequencing of cell-free DNA from maternal plasma in twin pregnancies. METHOD A double-blind study was performed over 12 months. A total of 189 pregnant women carrying twins were recruited from seven hospitals. Maternal plasma DNA sequencing was performed to detect trisomies 21 and 18. The fetal karyotype was used as gold standard to estimate the sensitivity and specificity of sequencing-based noninvasive prenatal test. RESULTS There were nine cases of trisomy 21 and two cases of trisomy 18 confirmed by karyotyping. Plasma DNA sequencing correctly identified nine cases of trisomy 21 and one case of trisomy 18. The discordant case of trisomy 18 was an unusual case of monozygotic twin with discordant fetal karyotype (one normal and the other trisomy 18). The sensitivity and specificity of maternal plasma DNA sequencing for fetal trisomy 21 were both 100% and for fetal trisomy 18 were 50% and 100%, respectively. CONCLUSION Our study further supported that sequencing-based noninvasive prenatal testing of trisomy 21 in twin pregnancies could be achieved with a high accuracy, which could effectively avoid almost 95% of invasive prenatal diagnosis procedures.
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Affiliation(s)
- Xuan Huang
- Fetal Medicine Center, Department of Obstetrics and Gynecology, First Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong, China
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Optimal antenatal care for twin and triplet pregnancy: The evidence base. Best Pract Res Clin Obstet Gynaecol 2014; 28:305-17. [DOI: 10.1016/j.bpobgyn.2013.12.006] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2013] [Revised: 11/06/2013] [Accepted: 12/10/2013] [Indexed: 11/21/2022]
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Abadir AM, Lang A, Klein T, Abenhaim HA. Influence of qualitative research on women's health screening guidelines. Am J Obstet Gynecol 2014; 210:44.e1-6. [PMID: 24055587 DOI: 10.1016/j.ajog.2013.09.021] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2013] [Revised: 09/03/2013] [Accepted: 09/13/2013] [Indexed: 12/01/2022]
Abstract
OBJECTIVE Considerable time and resources are allocated to carry out qualitative research. The purpose of our study was to evaluate the availability of qualitative research on women's health screening and assess its influence on screening practice guidelines in the United States, Canada, and the United Kingdom. STUDY DESIGN Medline, CINHAL, and WEB of Science databases were used to identify the availability of qualitative research conducted in the past 15 years on 3 different women's health screening topics: cervical cancer screening, breast cancer screening, and prenatal first-trimester screening. Key national practice guidelines on women's health screening were selected using the National Guideline Clearinghouse web site. Bibliometric analysis was used to determine the frequency of qualitative references cited in the guidelines. RESULTS A total of 272 qualitative research papers on women's health screening was identified: 109 on cervical cancer screening, 104 on breast cancer screening, and 59 on prenatal first-trimester screening. The qualitative studies focused on health care provider perspectives as well as ethical, ethnographic, psychological, and social issues surrounding screening. Fifteen national clinical practice guidelines on women's health screening were identified. A total of 943 references was cited, only 2 of which comprised of qualitative research cited by only 1 clinical practice guideline. CONCLUSION Although there is considerable qualitative research that has been carried out on women's health screening, its incorporation into clinical practice guidelines is minimal. Further exploration of the disconnect between the two is important for enhancing knowledge translation of qualitative research within clinical practice.
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Affiliation(s)
- Anna Maria Abadir
- Department of Obstetrics and Gynecology, Jewish General Hospital, McGill University, Montreal, QC, Canada
| | - Ariella Lang
- Victorian Order of Nurses of Canada, Ottawa, ON, Canada
| | | | - Haim Arie Abenhaim
- Department of Obstetrics and Gynecology, Jewish General Hospital, McGill University, Montreal, QC, Canada.
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Désilets V, Audibert F, Wilson R, Audibert F, Brock JA, Carroll J, Cartier L, Gagnon A, Johnson JA, Langlois S, MacDonald W, Murphy-Kaulbeck L, Okun N, Pastuck M, Senikas V. Investigation and Management of Non-immune Fetal Hydrops. JOURNAL OF OBSTETRICS AND GYNAECOLOGY CANADA 2013; 35:923-38. [DOI: 10.1016/s1701-2163(15)30816-1] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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Assessing the impact of the SOGC recommendations to increase access to prenatal screening on overall use of health resources in pregnancy. JOURNAL OF OBSTETRICS AND GYNAECOLOGY CANADA 2013; 35:444-453. [PMID: 23756275 DOI: 10.1016/s1701-2163(15)30935-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
OBJECTIVES The recommendation by the Society of Obstetricians and Gynaecologists of Canada that prenatal screening for fetal aneuploidy be offered to all pregnant women is an important change in clinical obstetrics. However, it is unknown how this recommendation might affect the use of other health resources during pregnancy. METHODS Twelve clinical and administrative databases were linked, and care paths outlining typical service use in pregnancy were created based on the type of prenatal screening accessed (first trimester screening [FTS], maternal serum screening [MSS], invasive testing only, or no screening and/or diagnosis). Logistic, Poisson, and negative binomial models were applied to the data to examine the association between use of prenatal screening/diagnosis and other health services during pregnancy. RESULTS Women who accessed prenatal screening/diagnosis were significantly more likely to have a consultation with a medical geneticist (FTS OR 2.42; 95% CI 1.75 to 3.33; MSS OR 4.84; 95% CI 2.92 to 8.03; and invasive testing OR 8.58; 95% CI 5.28 to 13.94), and women who accessed FTS had more prenatal visits (FTS incidence rate ratio 1.03; 95% CI 1.01 to 1.05) than women who did not access prenatal screening/diagnosis. Uptake of invasive tests did not differ between women who accessed FTS and those who accessed MSS. Use of prenatal screening/diagnosis was not significantly associated with use of most other health resources CONCLUSION In a publicly funded health care system, understanding the impact of recommendations to increase access to a specific service on other services is important. Recommendations to increase access to prenatal screening services may have some unanticipated downstream effects on the use of other services during pregnancy. However, most aspects of health resource use in pregnancy do not appear to be influenced by the use of prenatal screening services.
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Errors in prenatal diagnosis. Best Pract Res Clin Obstet Gynaecol 2013; 27:537-48. [PMID: 23725900 DOI: 10.1016/j.bpobgyn.2013.04.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2013] [Accepted: 04/22/2013] [Indexed: 11/21/2022]
Abstract
Prenatal screening and diagnosis are integral to antenatal care worldwide. Prospective parents are offered screening for common fetal chromosomal and structural congenital malformations. In most developed countries, prenatal screening is routinely offered in a package that includes ultrasound scan of the fetus and the assay in maternal blood of biochemical markers of aneuploidy. Mistakes can arise at any point of the care pathway for fetal screening and diagnosis, and may involve individual or corporate systemic or latent errors. Special clinical circumstances, such as maternal size, fetal position, and multiple pregnancy, contribute to the complexities of prenatal diagnosis and to the chance of error. Clinical interventions may lead to adverse outcomes not caused by operator error. In this review I discuss the scope of the errors in prenatal diagnosis, and highlight strategies for their prevention and diagnosis, as well as identify areas for further research and study to enhance patient safety.
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Metcalfe A, Currie G, Johnson JA, Bernier F, Lix LM, Lyon AW, Tough SC. Impact of observed versus hypothesized service utilization on the incremental cost of first trimester screening and prenatal diagnosis for trisomy 21 in a Canadian province. Prenat Diagn 2013; 33:429-35. [DOI: 10.1002/pd.4082] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Amy Metcalfe
- Department of Obstetrics and Gynaecology; University of British Columbia; Vancouver Canada
| | - Gillian Currie
- Department of Pediatrics; University of Calgary; Calgary Canada
- Department of Community Health Sciences; University of Calgary; Calgary Canada
| | - Jo-Ann Johnson
- Department of Obstetrics and Gynaecology; University of Calgary; Calgary Canada
| | - Francois Bernier
- Department of Medical Genetics; Alberta Children's Hospital; Calgary Canada
| | - Lisa M. Lix
- Department of Community Health Sciences; University of Manitoba; Winnipeg Canada
| | - Andrew W. Lyon
- Department of Pathology and Laboratory Medicine, Saskatoon Health Region and College of Medicine; University of Saskatchewan; Saskatoon Canada
| | - Suzanne C. Tough
- Department of Pediatrics; University of Calgary; Calgary Canada
- Department of Community Health Sciences; University of Calgary; Calgary Canada
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Cartier L, Murphy-Kaulbeck L. Counselling considerations for prenatal genetic screening. JOURNAL OF OBSTETRICS AND GYNAECOLOGY CANADA 2012; 34:489-493. [PMID: 22555144 DOI: 10.1016/s1701-2163(16)35248-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
This document has been developed to aid clinicians in counselling patients about prenatal screening and to provide assistance in counselling about both positive and negative screening results.
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Chitayat D, Langlois S, Gagnon A, Wilson RD, Audibert F. Prenatal screening for fetal aneuploidy. JOURNAL OF OBSTETRICS AND GYNAECOLOGY CANADA 2011; 33:1093-1094. [PMID: 22082781 DOI: 10.1016/s1701-2163(16)35075-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Prenatal Screening for Fetal Aneuploidy. JOURNAL OF OBSTETRICS AND GYNAECOLOGY CANADA 2011. [DOI: 10.1016/s1701-2163(16)35074-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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