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Martínez-Hortelano JA, González PB, Rodríguez-Rojo IC, Garrido-Miguel M, Arenas-Arroyo SND, Sequí-Domínguez I, Martínez-Vizcaíno V, Berlanga-Macías C. Interpregnancy weight change and neonatal and infant outcomes: A systematic review and meta-analysis. Ann Epidemiol 2024; 97:1-10. [PMID: 39002666 DOI: 10.1016/j.annepidem.2024.07.002] [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: 11/24/2023] [Revised: 07/04/2024] [Accepted: 07/07/2024] [Indexed: 07/15/2024]
Abstract
PURPOSE To synthesize evidence regarding the association between interpregnancy weight change (IPWC) in consecutive pregnancies and neonatal or infant outcomes in the subsequent pregnancy. METHODS Search strategy was implemented in MEDLINE, EMBASE, Web of Science, Scopus and Cochrane Library from their inception to 13 November 2023. The most adjusted odds ratio (OR) or risk ratio estimates provided by original studies were used to calculate pooled risk ratios and their corresponding 95 % confidence intervals (CI) with the DerSimonian and Laird random effects method. Publication bias was assessed by funnel plots and Egger's method, and risk of bias was assessed with The NewcastleOttawa Quality Assessment Scale. RESULTS Thirty-seven observational studies were included. Interpregnancy weight loss or gain were associated with large for gestational age (OR: 0.89; 95 % CI: 0.84-0.94; I2 = 83.6 % and OR: 1.33; 95 % CI:1.26-1.40; I2 = 98.9 %), and stillbirth risk (OR: 1.10; 95 % CI: 1.01-1.18; I2 = 0.0 % and OR: 1.21; 95 % CI: 1.09-1.33; I2 = 60.2 %,). CONCLUSIONS Findings highlight the importance of managing weight between interpregnancy periods, although these findings should be interpreted cautiously because of the possible influence of social determinants of health and other factors.
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Affiliation(s)
- José Alberto Martínez-Hortelano
- Universidad de Alcalá, Facultad de Enfermería y Fisioterapia, Departamento de Enfermería y Fisioterapia, Enfermería, Cuidado comunitario y Determinantes Sociales de la Salud, Madrid, Spain; University of Castilla-La Mancha, Health Care and Social Research Center, Cuenca, Spain
| | - Patricia Blázquez González
- Universidad de Alcalá, Facultad de Enfermería y Fisioterapia, Departamento de Enfermería y Fisioterapia, Enfermería, Cuidado comunitario y Determinantes Sociales de la Salud, Madrid, Spain; Department of Nursing, Red Cross University, Madrid, Spain
| | - Inmaculada Concepción Rodríguez-Rojo
- Universidad de Alcalá, Facultad de Enfermería y Fisioterapia, Departamento de Enfermería y Fisioterapia, Enfermería, Cuidado comunitario y Determinantes Sociales de la Salud, Madrid, Spain; Center for Cognitive and Computational Neuroscience, Universidad Complutense de Madrid, Madrid, Spain.
| | - Miriam Garrido-Miguel
- University of Castilla-La Mancha, Health Care and Social Research Center, Cuenca, Spain; Universidad de Castilla-La Mancha, Facultad de Enfermería de Albacete, Albacete, Spain
| | - Sergio Núñez de Arenas-Arroyo
- University of Castilla-La Mancha, Health Care and Social Research Center, Cuenca, Spain; Network for Research on Chronicity, Primary Care, and Health Promotion (RICAPPS), Cuenca, Spain
| | - Irene Sequí-Domínguez
- University of Castilla-La Mancha, Health Care and Social Research Center, Cuenca, Spain; Universidad de Castilla-La Mancha, Facultad de Enfermería de Albacete, Albacete, Spain
| | - Vicente Martínez-Vizcaíno
- University of Castilla-La Mancha, Health Care and Social Research Center, Cuenca, Spain; Facultad de Ciencias de la Salud, Universidad Autónoma de Chile, Talca, Chile
| | - Carlos Berlanga-Macías
- University of Castilla-La Mancha, Health Care and Social Research Center, Cuenca, Spain; Universidad de Castilla-La Mancha, Facultad de Enfermería de Albacete, Albacete, Spain
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Nagpal TS, Souza SCS, Moffat M, Hayes L, Nuyts T, Liu RH, Bogaerts A, Dervis S, Piccinini-Vallis H, Adamo KB, Heslehurst N. Does prepregnancy weight change have an effect on subsequent pregnancy health outcomes? A systematic review and meta-analysis. Obes Rev 2022; 23:e13324. [PMID: 34694053 DOI: 10.1111/obr.13324] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Revised: 06/25/2021] [Accepted: 07/05/2021] [Indexed: 11/26/2022]
Abstract
International guidelines recommend women with an overweight or obese body mass index (BMI) aim to reduce their body weight prior to conception to minimize the risk of adverse perinatal outcomes. Recent systematic reviews have demonstrated that interpregnancy weight gain increases women's risk of developing adverse pregnancy outcomes in their subsequent pregnancy. Interpregnancy weight change studies exclude nulliparous women. This systematic review and meta-analysis was conducted following MOOSE guidelines and summarizes the evidence of the impact of preconception and interpregnancy weight change on perinatal outcomes for women regardless of parity. Sixty one studies met the inclusion criteria for this review and reported 34 different outcomes. We identified a significantly increased risk of gestational diabetes (OR 1.88, 95% CI 1.66, 2.14, I2 = 87.8%), hypertensive disorders (OR 1.46 95% CI 1.12, 1.91, I2 = 94.9%), preeclampsia (OR 1.92 95% CI 1.55, 2.37, I2 = 93.6%), and large-for-gestational-age (OR 1.36, 95% CI 1.25, 1.49, I2 = 92.2%) with preconception and interpregnancy weight gain. Interpregnancy weight loss only was significantly associated with increased risk for small-for-gestational-age (OR 1.29 95% CI 1.11, 1.50, I2 = 89.9%) and preterm birth (OR 1.06 95% CI 1.00, 1.13, I2 = 22.4%). Our findings illustrate the need for effective preconception and interpregnancy weight management support to improve pregnancy outcomes in subsequent pregnancies.
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Affiliation(s)
- Taniya S Nagpal
- Faculty of Health Sciences, School of Human Kinetics, University of Ottawa, Ottawa, Canada
| | - Sara C S Souza
- Faculty of Health Sciences, School of Human Kinetics, University of Ottawa, Ottawa, Canada
| | - Malcolm Moffat
- Population Health Sciences Institute, Faculty of Medical Sciences, Newcastle University, Newcastle, UK
| | - Louise Hayes
- Population Health Sciences Institute, Faculty of Medical Sciences, Newcastle University, Newcastle, UK
| | - Tinne Nuyts
- Department of Development and Regeneration, Research Unit Woman and Child, KU Leuven, Leuven, Belgium
| | - Rebecca H Liu
- Institute for Health System Solutions & Virtual Care, Women's College Hospital, Toronto, Canada
| | - Annick Bogaerts
- Department of Development and Regeneration, Research Unit Woman and Child, KU Leuven, Leuven, Belgium.,Faculty of Medicine and Health Sciences, Centre for Research and Innovation in Care (CRIC), University of Antwerp, Antwerp, Belgium.,Faculty of Health, University of Plymouth, Plymouth, UK
| | - Sheila Dervis
- Faculty of Health Sciences, School of Human Kinetics, University of Ottawa, Ottawa, Canada
| | - Helena Piccinini-Vallis
- Faculty of Medicine, Departments of Family Medicine and Obstetrics and Gynecology, Dalhousie University, Halifax, Canada
| | - Kristi B Adamo
- Faculty of Health Sciences, School of Human Kinetics, University of Ottawa, Ottawa, Canada
| | - Nicola Heslehurst
- Population Health Sciences Institute, Faculty of Medical Sciences, Newcastle University, Newcastle, UK
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3
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Tabet M, Banna S, Luong L, Kirby R, Chang JJ. Pregnancy Outcomes after Preeclampsia: The Effects of Interpregnancy Weight Change. Am J Perinatol 2021; 38:1393-1402. [PMID: 32521560 DOI: 10.1055/s-0040-1713000] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
OBJECTIVE This study aimed to examine the effects of interpregnancy weight change on pregnancy outcomes, including recurrent preeclampsia, preterm birth, small-for-gestational age (SGA), large-for-gestational age (LGA), and cesarean delivery, among women with a history of preeclampsia. We also evaluated whether these associations were modified by prepregnancy body mass index (BMI) category in the first pregnancy (BMI < 25 vs. ≥25 kg/m2) and if associations were present among women who maintained a healthy BMI category in both pregnancies. STUDY DESIGN We conducted a population-based retrospective cohort study including 15,108 women who delivered their first two nonanomalous singleton live births in Missouri (1989-2005) and experienced preeclampsia in the first pregnancy. We performed Poisson regression with robust error variance to estimate relative risks and 95% confidence intervals for outcomes of interest after controlling for potential confounders. RESULTS Interpregnancy weight gain was associated with increased risk of recurrent preeclampsia, LGA, and cesarean delivery. These risks increased in a "dose-response" manner with increasing magnitude of interpregnancy weight gain and were generally more pronounced among women who were underweight or normal weight in the first pregnancy. Interpregnancy weight loss exceeding 1 BMI unit was associated with increased risk of SGA among underweight and normal weight women, while interpregnancy weight loss exceeding 2 BMI units was associated with reduced risk of recurrent preeclampsia among overweight and obese women. CONCLUSION Even small changes in interpregnancy weight may significantly affect pregnancy outcomes among formerly preeclamptic women. Appropriate weight management between pregnancies has the potential to attenuate such risks. KEY POINTS · Interpregnancy weight change among formerly preeclamptic women significantly affects pregnancy outcomes.. · Interpregnancy weight gain is associated with increased risk of recurrent preeclampsia, large-for-gestational-age and cesarean delivery.. · Interpregnancy weight loss is associated with increased risk of small-for-gestational age and recurrent preeclampsia..
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Affiliation(s)
- Maya Tabet
- Department of Epidemiology and Biostatistics, College for Public Health and Social Justice, Saint Louis University, Saint Louis, Missouri
| | - Soumya Banna
- School of Medicine, Saint Louis University, Saint Louis, Missouri
| | - Lan Luong
- Department of Epidemiology and Biostatistics, College for Public Health and Social Justice, Saint Louis University, Saint Louis, Missouri
| | - Russell Kirby
- Department of Community and Family Health, College of Public Health, University of South Florida, Tampa, Florida
| | - Jen Jen Chang
- Department of Epidemiology and Biostatistics, College for Public Health and Social Justice, Saint Louis University, Saint Louis, Missouri
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4
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Maternal weight change between successive pregnancies: an opportunity for lifecourse obesity prevention. Proc Nutr Soc 2020; 79:272-282. [PMID: 32624015 DOI: 10.1017/s0029665120007065] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Maternal obesity is a major risk factor for adverse health outcomes for both the mother and the child, including the serious public health problem of childhood obesity which is globally on the rise. Given the relatively intensive contact with health/care professionals following birth, the interpregnancy period provides a golden opportunity to focus on preconception and family health, and to introduce interventions that support mothers to achieve or maintain a healthy weight in preparation for their next pregnancy. In this review, we summarise the evidence on the association between interpregnancy weight gain with birth and obesity outcomes in the offspring. Gaining weight between pregnancies is associated with an increased risk of large-for-gestational age (LGA) birth, a predictor of childhood obesity, and weight loss between pregnancies in women with overweight or obesity seems protective against recurrent LGA. Interpregnancy weight loss seems to be negatively associated with birthweight. There is some suggestion that interpregnancy weight change may be associated with preterm birth, but the mechanisms are unclear and the direction depends if it is spontaneous or indicated. There is limited evidence on the direct positive link between maternal interpregnancy weight gain with gestational diabetes, pre-eclampsia, gestational hypertension and obesity or overweight in childhood, with no studies using adult offspring adiposity outcomes. Improving preconception health and optimising weight before pregnancy could contribute to tackling the rise in childhood obesity. Research testing the feasibility, acceptability and effectiveness of interventions to optimise maternal weight and health during this period is needed, particularly in high-risk and disadvantaged groups.
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Timmermans YEG, van de Kant KDG, Oosterman EO, Spaanderman MEA, Villamor-Martinez E, Kleijnen J, Vreugdenhil ACE. The impact of interpregnancy weight change on perinatal outcomes in women and their children: A systematic review and meta-analysis. Obes Rev 2020; 21:e12974. [PMID: 31751496 PMCID: PMC7050512 DOI: 10.1111/obr.12974] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/06/2019] [Revised: 10/03/2019] [Accepted: 10/12/2019] [Indexed: 12/12/2022]
Abstract
Prepregnancy overweight and obesity are associated with higher risk of perinatal complications. However, the effect of weight change prior to pregnancy on perinatal outcome is largely unknown. Therefore, it is aimed to examine the impact on perinatal outcomes of interpregnancy BMI change in women of different BMI categories. The MEDLINE, EMBASE, LILACS, and CINAHL databases were searched (1990-August 2019). Observational studies on interpregnancy BMI change were selected. Outcomes evaluated were gestational diabetes mellitus (GDM), preeclampsia, gestational hypertension (GH), cesarean section, preterm birth, and newborns being large (LGA) or small (SGA) for gestational age. Meta-analyses and meta-regression analyses were executed. Thirty studies were included (n > 1 million). Interpregnancy BMI gain was associated with a higher risk of GDM (for BMI gain ≥3 kg/m2 : OR 2.21; [95%CI 1.53-3.19]), preeclampsia (1.77 [1.53-2.04]), GH (1.78 [1.61-1.97]), cesarean section (1.32 [1.24-1.39]), and LGA (1.54 [1.28-1.86]). The effects of BMI gain were most pronounced in women with BMI <25 kg/m2 before the first pregnancy regarding GDM, GH, and cesarean section. Except for LGA, interpregnancy BMI loss did not result in a decreased risk of perinatal complications. In this study, women of normal weight who gain weight before pregnancy were identified as a high-risk population for perinatal complications. This emphasizes that weight management is important for women of all BMI categories and a pregnancy wish.
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Affiliation(s)
- Yvon E G Timmermans
- Department of Pediatrics, Maastricht University Medical Centre (MUMC+), Maastricht, The Netherlands.,School for Oncology and Developmental Biology (GROW), Maastricht University, Maastricht, The Netherlands
| | - Kim D G van de Kant
- Department of Pediatrics, Maastricht University Medical Centre (MUMC+), Maastricht, The Netherlands.,School for Public Health and Primary Health Care (CAPHRI), Department of Family Medicine, Maastricht University, Maastricht, The Netherlands
| | - Elise O Oosterman
- Department of Pediatrics, Maastricht University Medical Centre (MUMC+), Maastricht, The Netherlands
| | - Marc E A Spaanderman
- School for Oncology and Developmental Biology (GROW), Maastricht University, Maastricht, The Netherlands.,Department of Gynecology and Obstetrics, Maastricht University Medical Centre (MUMC+), Maastricht, The Netherlands
| | - Eduardo Villamor-Martinez
- Department of Pediatrics, Maastricht University Medical Centre (MUMC+), Maastricht, The Netherlands.,School for Oncology and Developmental Biology (GROW), Maastricht University, Maastricht, The Netherlands
| | - Jos Kleijnen
- School for Public Health and Primary Health Care (CAPHRI), Department of Family Medicine, Maastricht University, Maastricht, The Netherlands
| | - Anita C E Vreugdenhil
- Department of Pediatrics, Maastricht University Medical Centre (MUMC+), Maastricht, The Netherlands.,School of Nutrition and Translational Research in Metabolism (NUTRIM), Maastricht University, Maastricht, The Netherlands
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6
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Grove G, Ziauddeen N, Harris S, Alwan NA. Maternal interpregnancy weight change and premature birth: Findings from an English population-based cohort study. PLoS One 2019; 14:e0225400. [PMID: 31751407 PMCID: PMC6872207 DOI: 10.1371/journal.pone.0225400] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Accepted: 11/02/2019] [Indexed: 01/25/2023] Open
Abstract
Background The relationship between maternal weight change between pregnancies and premature birth is unclear. This study aimed to investigate whether interpregnancy weight change between first and second, or second and third pregnancy is associated with premature birth. Methods Routinely collected data from 2003 to 2018 from one English maternity centre was used to produce two cohorts. The primary cohort (n = 14,961 women) consisted of first and second live-birth pregnancies. The secondary cohort (n = 5,108 women) consisted of second and third live-birth pregnancies. Logistic regression models were used to examine associations between interpregnancy BMI change and premature births adjusted for confounders. Subgroup analyses were carried out, stratifying by initial pregnancy BMI groups and analysing spontaneous and indicated premature births separately. Results In the primary cohort, 3.4% (n = 514) of births were premature compared to 4.2% (n = 212) in the secondary cohort, with fewer indicated than spontaneous premature births in both cohorts. Primary cohort Weight loss (>3kg/m2) was associated with increased odds of premature birth (adjusted odds ratio (aOR):3.50, 95% CI: 1.78–6.88), and spontaneous premature birth (aOR: 3.34, 95%CI: 1.60–6.98), in women who were normal weight (BMI 18.5-25kg/m2) at first pregnancy. Weight gain >1kg/m2 was not associated with premature birth regardless of starting BMI. Secondary cohort Losing >3kg/m2 was associated with increased odds of premature birth (aOR: 2.01, 95%CI: 1.05–3.87), when analysing the whole sample, but not when restricting the analysis to women who were overweight or obese at second pregnancy. Conclusions Normal-weight women who lose significant weight (>3kg/m2) between their first and second live pregnancies have greater odds of premature birth compared to normal-weight women who remain weight stable in the interpregnancy period. There was no evidence of association between weight change in women who were overweight or obese at the start of their first pregnancy and premature birth.
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Affiliation(s)
- Grace Grove
- School of Primary Care, Population Sciences and Medical Education, Faculty of Medicine, University of Southampton, Southampton, United Kingdom
| | - Nida Ziauddeen
- School of Primary Care, Population Sciences and Medical Education, Faculty of Medicine, University of Southampton, Southampton, United Kingdom
| | - Scott Harris
- School of Primary Care, Population Sciences and Medical Education, Faculty of Medicine, University of Southampton, Southampton, United Kingdom
| | - Nisreen A. Alwan
- School of Primary Care, Population Sciences and Medical Education, Faculty of Medicine, University of Southampton, Southampton, United Kingdom
- NIHR Southampton Biomedical Research Centre, University of Southampton and University Hospital Southampton NHS Foundation Trust, Southampton, United Kingdom
- * E-mail:
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7
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Teulings NEWD, Masconi KL, Ozanne SE, Aiken CE, Wood AM. Effect of interpregnancy weight change on perinatal outcomes: systematic review and meta-analysis. BMC Pregnancy Childbirth 2019; 19:386. [PMID: 31660893 PMCID: PMC6819632 DOI: 10.1186/s12884-019-2566-2] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Accepted: 10/22/2019] [Indexed: 02/07/2023] Open
Abstract
Background Although obesity is a well-known risk factor for adverse pregnancy outcomes, evidence is sparse about the effects of interpregnancy weight change on the risk of adverse perinatal complications in a subsequent pregnancy. The current study aims to assess the effect of interpregnancy weight change on the risk of developing gestational diabetes, pre-eclampsia, pregnancy induced hypertension, preterm birth, or delivering a large- or small-for-gestational age neonate. Methods Pubmed, Ovid Embase, ClinicalTrial.gov and the Cochrane library were systematically searched up until July 24th, 2019. Interpregnancy weight change was defined as the difference between pre-pregnancy weight of an index pregnancy and a consecutive pregnancy. Inclusion criteria included full text original articles reporting quantitative data about interpregnancy weight change in multiparous women with any time interval between consecutive births and the risk of any perinatal complication of interest. Studies reporting adjusted odds ratios and a reference group of − 1 to + 1 BMI unit change between pregnancies were harmonised by meta-analysis. Results Twenty-three cohort studies identified a total of 671,906 women with two or more consecutive pregnancies. Seven of these studies were included in the meta-analysis (280,672 women). Interpregnancy weight gain was consistently associated with a higher risk of gestational diabetes, pre-eclampsia, pregnancy induced hypertension and large-for-gestational age births. In contrast, interpregnancy weight loss was associated with a lower risk of delivering a large-for-gestational age neonate. The effect magnitude (relative risk) of interpregnancy weight gain on pregnancy induced hypertension or delivering a large-for-gestational age neonate was greater among women with a normal BMI in the index pregnancy compared to women with a starting BMI ≥25 kg/m2. Conclusion These findings confirm that interpregnancy weight change impacts the risk of developing perinatal complications in a subsequent pregnancy. This provides evidence in support of guidelines encouraging women to achieve post-partum weight loss, as their risk of perinatal complications might be minimised if they return to their pre-pregnancy weight before conceiving again. Prospectively registered with PROSPERO (CRD42017067326).
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Affiliation(s)
- Noor E W D Teulings
- Department of Public Health and Primary Care, University of Cambridge, 2 Worth's Causeway Cambridge, Cambridge, CB1 8RN, UK. .,University of Cambridge Metabolic Research Laboratories and MRC Metabolic Diseases Unit, Wellcome Trust-MRC Institute of Metabolic Science, Addenbrooke's Hospital, Cambridge, CB2 0QQ, UK.
| | - Katya L Masconi
- Department of Public Health and Primary Care, University of Cambridge, 2 Worth's Causeway Cambridge, Cambridge, CB1 8RN, UK
| | - Susan E Ozanne
- University of Cambridge Metabolic Research Laboratories and MRC Metabolic Diseases Unit, Wellcome Trust-MRC Institute of Metabolic Science, Addenbrooke's Hospital, Cambridge, CB2 0QQ, UK
| | - Catherine E Aiken
- University of Cambridge Metabolic Research Laboratories and MRC Metabolic Diseases Unit, Wellcome Trust-MRC Institute of Metabolic Science, Addenbrooke's Hospital, Cambridge, CB2 0QQ, UK.,Department of Obstetrics and Gynaecology, University of Cambridge, Box 223, The Rosie Hospital and NIHR Cambridge Comprehensive Biomedical Research Centre, Cambridge, UK
| | - Angela M Wood
- Department of Public Health and Primary Care, University of Cambridge, 2 Worth's Causeway Cambridge, Cambridge, CB1 8RN, UK
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Benjamin RH, Littlejohn S, Canfield MA, Ethen MK, Hua F, Mitchell LE. Interpregnancy change in body mass index and infant outcomes in Texas: a population-based study. BMC Pregnancy Childbirth 2019; 19:119. [PMID: 30953457 PMCID: PMC6451298 DOI: 10.1186/s12884-019-2265-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2018] [Accepted: 03/26/2019] [Indexed: 02/04/2023] Open
Abstract
Background Maternal prepregnancy body mass index (BMI) is associated with several infant outcomes, but it is unclear whether these associations reflect causal relationships. We conducted a study of interpregnancy change in BMI (IPC-BMI) to improve understanding of the associations between BMI and large for gestational age (LGA), small for gestational age (SGA), and preterm birth (PTB). Methods Birth certificate data from 2481 linked sibling pairs (Texas, 2005–2012) were used to estimate IPC-BMI and evaluate its association with LGA, SGA, and PTB in the younger sibling of the pair. Multivariable logistic regression was used to estimate adjusted odds ratios (aOR) and 95% confidence intervals (CI) using data from the full sample and within strata defined by prepregnancy BMI for the older sibling. Results On average, women gained 1.1 BMI units between pregnancies. In the full sample, interpregnancy BMI decreases were associated with reduced odds of LGA and increased odds of SGA and PTB (IPC-BMI < -1 versus 0 to < 1: LGA aOR 0.7, 95% CI 0.4, 1.1; SGA aOR 1.6, 95% CI 1.0, 2.7; PTB aOR 1.9, 95% CI 1.3, 2.8). In stratified analyses, similar associations were observed in some, but not all, strata. Findings for interpregnancy BMI increases were less consistent, with little evidence for associations between these outcomes and the most extreme IPC-BMI increases. Conclusions There is growing evidence that interpregnancy BMI decreases are associated with LGA, SGA, and PTB. However, taken as a whole, the literature provides insufficient evidence to establish causal links between maternal BMI and these outcomes.
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Affiliation(s)
- Renata H Benjamin
- UTHealth School of Public Health, Department of Epidemiology, Human Genetics and Environmental Sciences, 1200 Pressler Street, Houston, TX, 77030, USA
| | - Sarah Littlejohn
- UTHealth School of Public Health, Department of Epidemiology, Human Genetics and Environmental Sciences, 1200 Pressler Street, Houston, TX, 77030, USA
| | - Mark A Canfield
- Birth Defects Epidemiology and Surveillance Branch, Texas Department of State Health Services, Austin, TX, USA
| | - Mary K Ethen
- Birth Defects Epidemiology and Surveillance Branch, Texas Department of State Health Services, Austin, TX, USA
| | - Fei Hua
- Center for Health Statistics, Texas Department of State Health Services, Austin, TX, USA
| | - Laura E Mitchell
- UTHealth School of Public Health, Department of Epidemiology, Human Genetics and Environmental Sciences, 1200 Pressler Street, Houston, TX, 77030, USA.
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McBain RD, Dekker GA, Clifton VL, Mol BW, Grzeskowiak LE. Impact of inter-pregnancy BMI change on perinatal outcomes: a retrospective cohort study. Eur J Obstet Gynecol Reprod Biol 2016; 205:98-104. [PMID: 27567535 DOI: 10.1016/j.ejogrb.2016.07.487] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2016] [Revised: 07/14/2016] [Accepted: 07/26/2016] [Indexed: 10/21/2022]
Abstract
OBJECTIVE To examine the patterns and predictors of inter-pregnancy body mass index (BMI) change and its impact on perinatal outcomes in the second pregnancy. DESIGN Retrospective cohort study. SETTING Tertiary teaching hospital in Adelaide, Australia. POPULATION Women with their first and second consecutive, singleton deliveries occurring between 2000 and 2012 (N=5371). METHODS Inter-pregnancy weight change calculated based on difference between BMI at respective antenatal booking visits. Association between inter-pregnancy weight change and perinatal outcomes investigated using multivariate generalised linear models, with stratification according to initial maternal BMI category in first pregnancy. MAIN OUTCOME MEASURES Gestational diabetes (GDM); pregnancy induced hypertensive disorders; small-for-gestational age (SGA); preterm birth; large-for-gestational age (LGA) and macrosomia (>4500g). RESULTS On average, women with a normal BMI gained 1kg/m(2) between first and second pregnancies, while women who were overweight or obese gained 1.37kg/m(2). Among women with a normal BMI in their first pregnancy, a BMI increase of ≥4kg/m(2) was associated with increased risk of developing GDM (aRR 1.97; 95% CI 1.22-3.19), a macrosomic (aRR 4.06; 95% CI 2.25-7.34) or LGA infant (aRR 1.31 0.96-1.78) in the second pregnancy, while a reduction in BMI (≤-2kg/m(2)) was associated with an increased risk of SGA (aRR 1.94; 1.19-3.16). Among women who were overweight or obese in their first pregnancy, a BMI increase of ≥2-4 and ≥4kg/m(2) was associated with increased risks of developing GDM in the second pregnancy (aRR 1.39; 95% CI 1.01-1.91 and aRR 1.64 95% CI 1.16-2.31; ptrend<0.001), while no associations were observed for a BMI increase and risk of a macrosomic, SGA, or LGA infant. In contrast, reduction in BMI (≤-2kg/m(2)) was associated with a reduced risk of GDM (aRR 0.58 95% CI 0.37-0.90) and SGA (aRR 0.47; 95% CI 0.25-0.87). CONCLUSION Increases in BMI between pregnancies is associated with an increased risk for perinatal complications, even in normal-weight women, while a reduction in BMI is associated with improved perinatal outcomes among women who are overweight/obese. Inter-pregnancy weight control is an important target to reduce the risk of an adverse perinatal outcome in a subsequent pregnancy.
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Affiliation(s)
- Rosemary D McBain
- Lyell McEwin Hospital, Elizabeth Vale, SA, Australia; School of Paediatrics and Reproductive Health, The Robinson Research Institute, The University of Adelaide, Adelaide, SA, Australia.
| | - Gustaaf A Dekker
- Lyell McEwin Hospital, Elizabeth Vale, SA, Australia; School of Paediatrics and Reproductive Health, The Robinson Research Institute, The University of Adelaide, Adelaide, SA, Australia
| | - Vicki L Clifton
- School of Paediatrics and Reproductive Health, The Robinson Research Institute, The University of Adelaide, Adelaide, SA, Australia
| | - Ben W Mol
- Lyell McEwin Hospital, Elizabeth Vale, SA, Australia; School of Paediatrics and Reproductive Health, The Robinson Research Institute, The University of Adelaide, Adelaide, SA, Australia
| | - Luke E Grzeskowiak
- School of Paediatrics and Reproductive Health, The Robinson Research Institute, The University of Adelaide, Adelaide, SA, Australia
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Villamor E, Cnattingius S. Interpregnancy weight change and risk of preterm delivery. Obesity (Silver Spring) 2016; 24:727-34. [PMID: 26833699 DOI: 10.1002/oby.21384] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/20/2015] [Revised: 10/02/2015] [Accepted: 10/10/2015] [Indexed: 11/06/2022]
Abstract
OBJECTIVE Prepregnant weight gain increases risk of obstetric complications, but its effect on preterm delivery is unknown. This study aimed to investigate the associations between change in body mass index (BMI) from first to second pregnancies and risk of preterm delivery in the second pregnancy according to the type and severity of preterm delivery. METHODS A nationwide cohort study was conducted in 465,836 Swedish women with their first two consecutive singleton live births between 1992 and 2012. Rates of very (22-31 gestational weeks) and moderately (32-36 gestational weeks) preterm delivery in the second pregnancy, classified as spontaneous or medically indicated, were compared between categories of interpregnancy BMI change. RESULTS Among women with first pregnancy BMI < 25, BMI gain ≥ 4 kg/m(2) and BMI loss > 2 kg/m(2) were related to 24% (95% CI, 5-46%) and 18% (95% CI, 5-33%) higher rates of spontaneous moderately preterm delivery, respectively. BMI gain ≥ 4 kg/m(2) was related to increased risk of medically indicated very preterm delivery. Weight loss was associated with reduced rates of medically indicated moderately preterm delivery among women with BMI ≥ 25. CONCLUSIONS High weight gain or loss in normal-weight women is associated with spontaneous moderately preterm delivery. High interpregnancy weight gain is related to increased risks of medically indicated preterm delivery.
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Affiliation(s)
- Eduardo Villamor
- Department of Epidemiology, School of Public Health and Center for Human Growth and Development, University of Michigan, Ann Arbor, Michigan, USA
| | - Sven Cnattingius
- Clinical Epidemiology Unit, Department of Medicine Solna, Karolinska University Hospital, Karolinska Institutet, Stockholm, Sweden
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Tabet M, Flick LH, Tuuli MG, Macones GA, Chang JJ. Prepregnancy body mass index in a first uncomplicated pregnancy and outcomes of a second pregnancy. Am J Obstet Gynecol 2015; 213:548.e1-7. [PMID: 26103529 DOI: 10.1016/j.ajog.2015.06.031] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2015] [Revised: 05/09/2015] [Accepted: 06/12/2015] [Indexed: 11/29/2022]
Abstract
OBJECTIVE This study examined the effect of body mass index (BMI) before a first uncomplicated pregnancy on maternal and fetal outcomes in a subsequent pregnancy, including preterm births, preeclampsia, cesarean delivery, small for gestational age, large for gestational age, and neonatal deaths. STUDY DESIGN We conducted a population-based cohort study (n = 121,092) using the Missouri maternally linked birth registry (1989 through 2005). Multivariable binary logistic regression models were fit to estimate odds ratios and 95% confidence intervals for the parameters of interest after controlling for sociodemographic and pregnancy-related confounders in the second pregnancy. RESULTS Compared to women with a normal BMI in their first pregnancy, those who were underweight prepregnancy had increased odds for preterm birth by 20% and small for gestational age by 40% in their second pregnancy, while those with prepregnancy obesity had increased odds for large for gestational age, preeclampsia, cesarean delivery, and neonatal deaths in their second pregnancy by 54%, 156%, 85%, and 37%, respectively. CONCLUSION Women starting a first pregnancy with suboptimal BMI may be at risk of adverse maternal and fetal outcomes in a subsequent pregnancy, even if their first pregnancy was uncomplicated or if they reached a normal weight by their second pregnancy. The long-term consequences of suboptimal BMI carry considerable public health implications.
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Affiliation(s)
- Maya Tabet
- Department of Epidemiology, College for Public Health and Social Justice, Saint Louis University, St. Louis, MO.
| | - Louise H Flick
- Department of Epidemiology, College for Public Health and Social Justice, Saint Louis University, St. Louis, MO
| | - Methodius G Tuuli
- Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, School of Medicine, Washington University in St. Louis, St. Louis, MO
| | - George A Macones
- Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, School of Medicine, Washington University in St. Louis, St. Louis, MO
| | - Jen Jen Chang
- Department of Epidemiology, College for Public Health and Social Justice, Saint Louis University, St. Louis, MO
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Gaudet L, Ferraro ZM, Wen SW, Walker M. Maternal obesity and occurrence of fetal macrosomia: a systematic review and meta-analysis. BIOMED RESEARCH INTERNATIONAL 2014; 2014:640291. [PMID: 25544943 PMCID: PMC4273542 DOI: 10.1155/2014/640291] [Citation(s) in RCA: 167] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/25/2014] [Accepted: 11/09/2014] [Indexed: 12/15/2022]
Abstract
OBJECTIVE To determine a precise estimate for the contribution of maternal obesity to macrosomia. DATA SOURCES The search strategy included database searches in 2011 of PubMed, Medline (In-Process & Other Non-Indexed Citations and Ovid Medline, 1950-2011), and EMBASE Classic + EMBASE. Appropriate search terms were used for each database. Reference lists of retrieved articles and review articles were cross-referenced. METHODS OF STUDY SELECTION All studies that examined the relationship between maternal obesity (BMI ≥30 kg/m(2)) (pregravid or at 1st prenatal visit) and fetal macrosomia (birth weight ≥4000 g, ≥4500 g, or ≥90th percentile) were considered for inclusion. TABULATION, INTEGRATION, AND RESULTS Data regarding the outcomes of interest and study quality were independently extracted by two reviewers. Results from the meta-analysis showed that maternal obesity is associated with fetal overgrowth, defined as birth weight ≥ 4000 g (OR 2.17, 95% CI 1.92, 2.45), birth weight ≥4500 g (OR 2.77,95% CI 2.22, 3.45), and birth weight ≥90% ile for gestational age (OR 2.42, 95% CI 2.16, 2.72). CONCLUSION Maternal obesity appears to play a significant role in the development of fetal overgrowth. There is a critical need for effective personal and public health initiatives designed to decrease prepregnancy weight and optimize gestational weight gain.
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Affiliation(s)
- Laura Gaudet
- University of Ottawa, Faculty of Medicine, 451 Smyth Road, Ottawa, ON, Canada K1H 8M5
- Division of Maternal-Fetal Medicine, Department of Obstetrics, Gynecology & Newborn Care, The Ottawa Hospital, 501 Smyth Road, Ottawa, ON, Canada K1H 8L6
- Ottawa Hospital Research Institute, Ottawa, ON, Canada K1H 8L6
| | - Zachary M. Ferraro
- Division of Maternal-Fetal Medicine, Department of Obstetrics, Gynecology & Newborn Care, The Ottawa Hospital, 501 Smyth Road, Ottawa, ON, Canada K1H 8L6
- Healthy Active Living and Obesity (HALO) Research Group, Children's Hospital of Eastern Ontario, 401 Smyth Road, Ottawa, ON, Canada K1H 8L1
| | - Shi Wu Wen
- Ottawa Hospital Research Institute, Ottawa, ON, Canada K1H 8L6
| | - Mark Walker
- University of Ottawa, Faculty of Medicine, 451 Smyth Road, Ottawa, ON, Canada K1H 8M5
- Division of Maternal-Fetal Medicine, Department of Obstetrics, Gynecology & Newborn Care, The Ottawa Hospital, 501 Smyth Road, Ottawa, ON, Canada K1H 8L6
- Ottawa Hospital Research Institute, Ottawa, ON, Canada K1H 8L6
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Abstract
INTRODUCTION There is increasingly a double burden of under-nutrition and obesity in women of reproductive age. Preconception underweight or overweight, short stature and micronutrient deficiencies all contribute to excess maternal and fetal complications during pregnancy. METHODS A systematic review and meta-analysis of the evidence was conducted to ascertain the possible impact of preconception care for adolescents, women and couples of reproductive age on maternal, newborn and child health (MNCH) outcomes. A comprehensive strategy was used to search electronic reference libraries, and both observational and clinical controlled trials were included. Cross-referencing and a separate search strategy for each preconception risk and intervention ensured wider study capture. RESULTS Maternal pre-pregnancy weight is a significant factor in the preconception period with underweight contributing to a 32% higher risk of preterm birth, and obesity more than doubling the risk for preeclampsia, gestational diabetes. Overweight women are more likely to undergo a Cesarean delivery, and their newborns have higher chances of being born with a neural tube or congenital heart defect. Among nutrition-specific interventions, preconception folic acid supplementation has the strongest evidence of effect, preventing 69% of recurrent neural tube defects. Multiple micronutrient supplementation shows promise to reduce the rates of congenital anomalies and risk of preeclampsia. Although over 40% of women worldwide are anemic in the preconception period, only one study has shown a risk for low birth weight. CONCLUSION All women, but especially those who become pregnant in adolescence or have closely-spaced pregnancies (inter-pregnancy interval less than six months), require nutritional assessment and appropriate intervention in the preconception period with an emphasis on optimizing maternal body mass index and micronutrient reserves. Increasing coverage of nutrition-specific and nutrition-sensitive strategies (such as food fortification; integration of nutrition initiatives with other maternal and child health interventions; and community based platforms) is necessary among adolescent girls and women of reproductive age. The effectiveness of interventions will need to be simultaneously monitored, and form the basis for the development of improved delivery strategies and new nutritional interventions.
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Affiliation(s)
- Sohni V Dean
- Division of Women and Child Health, Aga Khan University Karachi, Pakistan
| | - Zohra S Lassi
- Division of Women and Child Health, Aga Khan University Karachi, Pakistan
| | - Ayesha M Imam
- Division of Women and Child Health, Aga Khan University Karachi, Pakistan
| | - Zulfiqar A Bhutta
- Division of Women and Child Health, Aga Khan University Karachi, Pakistan
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Abstract
The notion of preconception care aims to target the existing risks before pregnancy, whereby resources may be used to improve reproductive health and optimize knowledge before conceiving. The preconception period provides an opportunity to intervene earlier to optimize the health of potential mothers (and fathers) and to prevent harmful exposures from affecting the developing fetus. These interventions include birth spacing and preventing teenage pregnancy, promotion of contraceptive use, optimization of weight and micronutrient status, prevention and management of infectious diseases, and screening for and managing chronic conditions. Given existing interventions and the need to organize services to optimize delivery of care in a logical and effective manner, interventions are frequently co-packaged or bundled together. This paper highlights packages of preconception interventions that can be combined and co-delivered to women through various delivery channels and provides a logical framework for development of such packages in varying contexts.
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Affiliation(s)
- Zohra S Lassi
- Division of Women and Child Health, Aga Khan University Karachi, Pakistan
| | - Sohni V Dean
- Division of Women and Child Health, Aga Khan University Karachi, Pakistan
| | - Dania Mallick
- Division of Women and Child Health, Aga Khan University Karachi, Pakistan
| | - Zulfiqar A Bhutta
- Division of Women and Child Health, Aga Khan University Karachi, Pakistan
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Abstract
OBJECTIVE To examine the association between interpregnancy weight change and the risk for adverse maternal and neonatal outcomes. METHODS All live-born singleton births delivered at 21-42 weeks of gestation in women who had their first two consecutive births between 2009 and 2011 in Flanders (the northern part of Belgium) and who were included in the Study Center for Perinatal Epidemiology database (N=7,897) were included. Interpregnancy weight change was calculated as the difference between the prepregnancy body mass index (BMI) of the first pregnancy and the prepregnancy BMI of the second pregnancy. Multivariate logistic regression analysis to predict gestational diabetes mellitus, pregnancy-induced hypertension, cesarean delivery, macrosomia (4,000 g or greater), low birth weight (less than 2,500 g), and congenital malformations were performed. RESULTS The adjusted odds ratio (OR) for gestational diabetes mellitus was 2.25 (95% confidence interval [CI] 1.33-3.78; P=.002) for interpregnancy weight retention of 2 or more BMI units, and the adjusted OR for pregnancy-induced hypertension was 3.76 (95% CI 2.16-6.57; P<.001) with an increase of 3 or more BMI units between pregnancies, but these associations were only present in underweight and normal-weight women. In overweight and obese women, the adjusted OR was 2.04 (95% CI 1.41-2.95; P<.001) for cesarean delivery for an interpregnancy weight retention of 2 or more BMI units. In underweight and normal-weight women, the risk for macrosomia was halved if women lost more than 1 BMI unit between pregnancies, but at the same time, the risk for low birth weight doubled. CONCLUSION We show that weight retention between the first and second pregnancy is associated with an increased risk for perinatal complications, even in underweight and normal-weight women. Stabilizing interpregnancy weight appears an important target for reducing adverse perinatal outcomes in a second pregnancy. LEVEL OF EVIDENCE II.
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Lassi ZS, Bhutta ZA. Risk factors and interventions related to maternal and pre-pregnancy obesity, pre-diabetes and diabetes for maternal, fetal and neonatal outcomes: a systematic review. ACTA ACUST UNITED AC 2014. [DOI: 10.1586/17474108.2013.841453] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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Sauerbrun-Cutler MT, Segars JH. Do in utero events contribute to current health disparities in reproductive medicine? Semin Reprod Med 2013; 31:325-32. [PMID: 23934692 DOI: 10.1055/s-0033-1348890] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Health disparities exist in reproductive medicine as discussed in detail in the subsequent articles of this issue; however, in most cases, the exact cause of these differences is unknown. Some of these disparities can be linked to environmental exposures such as alcohol and other hazardous toxic exposures (polycarbonate, pesticides, nicotine) in adults. In addition, low socioeconomic status, behavioral risk factors, and lack of education have been linked to poor obstetric and reproductive outcomes in minority groups. Aside from these various environmental exposures later in life, there is evidence that adverse events in utero could contribute to poor reproductive outcome in specific minority groups. We will focus on the developmental origins of health and disease as a possible causal mechanism for health disparities in reproductive diseases, as this perspective may suggest tractable solutions of how to address and eliminate these health disparities.
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Forsum E, Brantsæter AL, Olafsdottir AS, Olsen SF, Thorsdottir I. Weight loss before conception: A systematic literature review. Food Nutr Res 2013; 57:20522. [PMID: 23503117 PMCID: PMC3597776 DOI: 10.3402/fnr.v57i0.20522] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2012] [Revised: 01/07/2013] [Accepted: 01/30/2013] [Indexed: 11/14/2022] Open
Abstract
The prevalence of overweight and obesity in women has increased during the last decades. This is a serious concern since a high BMI before conception is an independent risk factor for many adverse outcomes of pregnancy. Therefore, dietary counseling, intended to stimulate weight loss in overweight and obese women prior to conception has recently been recommended. However, dieting with the purpose to lose weight may involve health risks for mother and offspring. We conducted a systematic literature review to identify papers investigating the effects of weight loss due to dietary interventions before conception. The objective of this study is to assess the effect of weight loss prior to conception in overweight or obese women on a number of health-related outcomes in mother and offspring using studies published between January 2000 and December 2011. Our first literature search produced 486 citations and, based on predefined eligibility criteria, 58 were selected and ordered in full text. Two group members read each paper. Fifteen studies were selected for quality assessment and two of them were considered appropriate for inclusion in evidence tables. A complementary search identified 168 citations with four papers being ordered in full text. The two selected studies provided data for overweight and obese women. One showed a positive effect of weight loss before pregnancy on the risk of gestational diabetes and one demonstrated a reduced risk for large-for-gestational-age infants in women with a BMI above 25 who lost weight before pregnancy. No study investigated the effect of weight loss due to a dietary intervention before conception. There is a lack of studies on overweight and obese women investigating the effect of dietary-induced weight loss prior to conception on health-related variables in mother and offspring. Such studies are probably lacking since they are difficult to conduct. Therefore, alternative strategies to control the body weight of girls and women of reproductive age are needed.
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Affiliation(s)
- Elisabet Forsum
- Department of Clinical and Experimental Medicine, Linköping University, Linköping, Sweden
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Di Renzo GC, Giardina I, Rosati A, Clerici G, Torricelli M, Petraglia F. Maternal risk factors for preterm birth: a country-based population analysis. Eur J Obstet Gynecol Reprod Biol 2011; 159:342-6. [DOI: 10.1016/j.ejogrb.2011.09.024] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2011] [Revised: 04/22/2011] [Accepted: 09/14/2011] [Indexed: 12/20/2022]
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Obesity and pregnancy: clinical management of the obese gravida. Am J Obstet Gynecol 2011; 204:106-19. [PMID: 21284965 DOI: 10.1016/j.ajog.2010.10.002] [Citation(s) in RCA: 103] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2010] [Revised: 09/24/2010] [Accepted: 10/06/2010] [Indexed: 01/08/2023]
Abstract
In recent years, the prevalence of obesity in the United States has risen dramatically, especially among women of reproductive age. Research that has specifically evaluated pregnancy outcomes among obese parturients has allowed for a better understanding of the myriad adverse perinatal complications that are observed with significantly greater frequency in the obese pregnant population. The antepartum, intrapartum, intraoperative, postoperative, and postpartum periods are all times in which the obese pregnant woman is at greater risk for adverse maternal-fetal outcomes, compared with her ideal bodyweight counterpart. Comorbid medical conditions that commonly are associated with obesity further accentuate perinatal risks. All obese pregnant women should be counseled regarding these risks, and strategies should be used to improve perinatal outcome whenever possible. Obese women of reproductive age ideally should be counseled before conception and advised to achieve ideal bodyweight before pregnancy.
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