1
|
Abstract
Obesity, dieting, and weight cycling are common among reproductive-age women. Weight cycling refers to intentional weight loss followed by unintentional weight regain. Weight loss is accompanied by changes in gut peptides, adipose hormones, and energy expenditure that promote weight regain to a tightly regulated set point. While weight loss can improve body composition and surrogate markers of cardiometabolic health, it is hypothesized that the weight regain can result in an overshoot effect, resulting in excess weight gain, altered body composition, and negative effects on surrogate markers of cardiometabolic health. Numerous observational studies have examined the association of weight cycling and health outcomes. There appears to be modest association between weight cycling with type 2 diabetes mellitus and dyslipidemia in women, but no association with hypertension, cardiovascular events, and overall cancer risk. Interestingly, mild weight cycling may be associated with a decreased risk of overall and cardiovascular mortality. Little is known about the effects of weight cycling in the preconception period. Although obesity and weight gain are associated with pregnancy complications, preconception weight loss does not appear to mitigate the risk of most pregnancy complications related to obesity. Research on preconception weight cycling may provide insight into this paradox.
Collapse
Affiliation(s)
- Katelyn J Carey
- Department of Obstetrics and Gynecology, University of Rochester Medical Center, Rochester, New York
| | - Wendy Vitek
- Department of Obstetrics and Gynecology, University of Rochester Medical Center, Rochester, New York
| |
Collapse
|
2
|
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: 25] [Impact Index Per Article: 12.5] [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.
Collapse
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
| |
Collapse
|
3
|
Risk score to stratify miscarriage risk levels in preconception women. Sci Rep 2021; 11:12111. [PMID: 34103654 PMCID: PMC8187346 DOI: 10.1038/s41598-021-91567-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Accepted: 05/28/2021] [Indexed: 12/03/2022] Open
Abstract
Spontaneous miscarriage is one of the most common complications of pregnancy. Even though some risk factors are well documented, there is a paucity of risk scoring tools during preconception. In the S-PRESTO cohort study, Asian women attempting to conceive, aged 18-45 years, were recruited. Multivariable logistic regression model coefficients were used to determine risk estimates for age, ethnicity, history of pregnancy loss, body mass index, smoking status, alcohol intake and dietary supplement intake; from these we derived a risk score ranging from 0 to 17. Miscarriage before 16 weeks of gestation, determined clinically or via ultrasound. Among 465 included women, 59 had miscarriages and 406 had pregnancy ≥ 16 weeks of gestation. Higher rates of miscarriage were observed at higher risk scores (5.3% at score ≤ 3, 17.0% at score 4–6, 40.0% at score 7–8 and 46.2% at score ≥ 9). Women with scores ≤ 3 were defined as low-risk level (< 10% miscarriage); scores 4–6 as intermediate-risk level (10% to < 40% miscarriage); scores ≥ 7 as high-risk level (≥ 40% miscarriage). The risk score yielded an area under the receiver-operating-characteristic curve of 0.74 (95% confidence interval 0.67, 0.81; p < 0.001). This novel scoring tool allows women to self-evaluate their miscarriage risk level, which facilitates lifestyle changes to optimize modifiable risk factors in the preconception period and reduces risk of spontaneous miscarriage.
Collapse
|
4
|
Kim SY, Park ES, Kim HW. Effectiveness of Non-Pharmacological Interventions for Overweight or Obese Infertile Women: A Systematic Review and Meta-Analysis. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:ijerph17207438. [PMID: 33066039 PMCID: PMC7650570 DOI: 10.3390/ijerph17207438] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Revised: 09/27/2020] [Accepted: 10/05/2020] [Indexed: 12/23/2022]
Abstract
Obesity is a well-known risk factor for infertility, and nonpharmacological treatments are recommended as effective and safe, but evidence is still lacking on whether nonpharmacological interventions improve fertility in overweight or obese women. The aim of this study was to systematically assess the current evidence in the literature and to evaluate the impact of nonpharmacological interventions on improving pregnancy-related outcomes in overweight or obese infertile women. Seven databases were searched for randomized controlled trials (RCTs) of nonpharmacological interventions for infertile women with overweight or obesity through August 16, 2019 with no language restriction. A meta-analysis was conducted of the primary outcomes. A total of 21 RCTs were selected and systematically reviewed. Compared to the control group, nonpharmacological interventions significantly increased the pregnancy rate (relative risk (RR), 1.37; 95% CI, 1.04–1.81; p = 0.03; I2 = 58%; nine RCTs) and the natural conception rate (RR, 2.17, 95% CI, 1.41–3.34; p = 0.0004; I2 = 19%, five RCTs). However, they had no significant effect on the live birth rate (RR, 1.36, 95% CI, 0.94–1.95; p=0.10, I2 = 65%, eight RCTs) and increased the risk of miscarriage (RR: 1.57, 95% CI, 1.05–2.36; p = 0.03; I2 = 0%). Therefore, nonpharmacological interventions could have a positive effect on the pregnancy and natural conception rates, whereas it is unclear whether they improve the live birth rate. Further research is needed to demonstrate the integrated effects of nonpharmacological interventions involving psychological outcomes, as well as pregnancy-related outcomes.
Collapse
Affiliation(s)
- Seo Yun Kim
- College of Nursing, Seoul National University, Seoul 03080, Korea;
| | - Eun-Sun Park
- Medical Library, Seoul National University, Seoul 03080, Korea;
| | - Hae Won Kim
- Research Institute of Nursing Science, College of Nursing, Seoul National University, Seoul 03080, Korea
- Correspondence: ; Tel.: +82-2-740-8820
| |
Collapse
|
5
|
Vitek W, Sun F, Hoeger KM, Santoro N, Diamond MP, Zhang H, Legro RS. Short-term weight change and live birth among women with unexplained infertility and polycystic ovary syndrome undergoing ovulation induction. Fertil Steril 2020; 114:1032-1039. [PMID: 33036790 DOI: 10.1016/j.fertnstert.2020.06.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2019] [Revised: 05/12/2020] [Accepted: 06/01/2020] [Indexed: 12/23/2022]
Abstract
OBJECTIVE To determine if short-term weight change among women with unexplained infertility (UI) and polycystic ovary syndrome (PCOS) undergoing ovulation induction is associated with live birth. DESIGN Secondary analysis of randomized trials. SETTING Multicenter fertility trial sites. PATIENT(S) A total of 900 women with UI and 750 women with PCOS. MAIN OUTCOME MEASURE(S) Live birth. INTERVENTION(S) Weight assessment at enrollment and start of up to 4-5 cycles of clomiphene, letrozole, or gonadotropins and intrauterine insemination for women with UI and clomiphene or letrozole with regular intercourse for women with PCOS. RESULT(S) Weight data were available for 856 women with UI and 697 women with PCOS. Mean weight change was -0.2 ± 0.3 kg among women with UI and +2.2 ± 0.2 kg among women with PCOS and did not differ based on treatment allocation. There were 115 women with PCOS (16.4%) who gained ≥3 kg. Increased body mass index and three or more cycles were associated with weight gain in women with PCOS. There was no difference in live birth rate among women with PCOS and ≥3 kg weight gain and women with PCOS who did not gain weight. CONCLUSION(S) Women with PCOS gained an average of 2.2 kg regardless of the medication received, whereas women with UI experienced no short-term weight change during ovulation induction. Weight gain in women with PCOS was not associated with live birth rate.
Collapse
Affiliation(s)
- Wendy Vitek
- University of Rochester School of Medicine and Dentistry, Rochester, New York.
| | - Fangbai Sun
- Yale School of Public Health, New Haven, Connecticut
| | - Kathleen M Hoeger
- University of Rochester School of Medicine and Dentistry, Rochester, New York
| | | | | | - Heping Zhang
- Yale School of Public Health, New Haven, Connecticut
| | | | | |
Collapse
|
6
|
Espinós JJ, Solà I, Valli C, Polo A, Ziolkowska L, Martínez-Zapata MJ. The Effect of Lifestyle Intervention on Pregnancy and Birth Outcomes on Obese Infertile Women: A Systematic Review and Meta-Analysis. INTERNATIONAL JOURNAL OF FERTILITY & STERILITY 2020; 14:1-9. [PMID: 32112628 PMCID: PMC7139226 DOI: 10.22074/ijfs.2020.5921] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Accepted: 10/05/2019] [Indexed: 12/28/2022]
Abstract
Obesity has been associated with negative effects on natural fertility and poor prognosis when assisted reproductive technologies (ART) are performed. Patients attending for fertility treatments are often advised to optimize their weights to improve the outcomes. There is lack of enough information on how weight-loss would be effective for improving fertility in women who are overweight or obese. We conducted a systematic review to evaluate whether weight-loss achieved by lifestyle program improves natural or assisted reproduction in obese infertile women. We searched CENTRAL, MEDLINE, and EMBASE up to March 2018. Two reviews were selected as randomised trials assessing a lifestyle intervention in women with obesity before receiving treatments for infertility and appraised their risk of bias. We extracted data on pregnancy, birth, and miscarriage rates as the primary outcomes and pooled effect estimates using a random effects model. The primary outcome was the live birth rate. We reported summary measures as the relative risk (RR), 95% confidence interval (CI), and percentage of heterogeneity (I2). We included eight randomised trials with 1175 women. Lifestyle programmes, improved pregnancy rates (RR: 1.43, CI: 95% 1.02 to 2.01; I2=60%; 8 RCTs; N=1098) but had no impact on live births (RR: 1.39, CI: 95% 0.90 to 2.14; I2=64%; 7RCTs; N=1034). Our findings suggest that women participating in lifestyle interventions had an increased risk of miscarriage (RR: 1.50, CI: 95% 1.04 to 2.16; I2=0; 6RCTs; N=543). We rated the quality of evidence for these outcomes as the moderate-to-low. Lifestyle interventions slightly increased the pregnancy rate, while it would be uncertain whether it can improve the live birth. Lifestyle interventions can increase the risk of miscarriage. More research is needed to further explore lifestyle interventions on reproductive outcomes in obese infertile women.
Collapse
Affiliation(s)
- Juan J Espinós
- Department of Obstetrics and Gynaecology, Hospital de la Santa Creu i Sant Pau, Barcelona, Universitat Autònoma de Barcelona (UAB), Bellaterra, Spain. Electronic Address:
| | - Ivan Solà
- IbCC Iberoamerican Cochrane Center, Barcelona, Spain
- CIBERESP CIBER Epidemiología y Salud Pública (CIBERESP), Barcelona, Spain
- IIB Sant Pau Biomedical Research Institute Sant Pau (IIB Sant Pau), Barcelona, Spain
| | - Claudia Valli
- IbCC Iberoamerican Cochrane Center, Barcelona, Spain
| | - Ana Polo
- Department of Reproduction Puigvert Foundation, Barcelona, Spain
| | - Lucja Ziolkowska
- IbCC Iberoamerican Cochrane Center, Barcelona, Spain
- Medical University of Silesia, Katowice, Poland
| | - M José Martínez-Zapata
- IbCC Iberoamerican Cochrane Center, Barcelona, Spain
- CIBERESP CIBER Epidemiología y Salud Pública (CIBERESP), Barcelona, Spain
- IIB Sant Pau Biomedical Research Institute Sant Pau (IIB Sant Pau), Barcelona, Spain
| |
Collapse
|
7
|
Gaskins AJ. Recent advances in understanding the relationship between long- and short-term weight change and fertility. F1000Res 2018; 7. [PMID: 30416711 PMCID: PMC6206616 DOI: 10.12688/f1000research.15278.1] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 10/22/2018] [Indexed: 11/20/2022] Open
Abstract
The impact of excess body weight on fertility is well recognized among both women attempting to conceive spontaneously and those attempting to conceive with medical assistance. Although many leading societies of reproductive medicine have proposed weight loss as a means to counteract the negative consequences of obesity on fertility, there is limited research on this topic. In this review, we provide a brief overview of the recent advances in the literature focused on how long- and short-term weight change affects fertility among women. Overall, despite initial hope that weight loss may be beneficial for fertility, two large well-conducted randomized controlled trials have consistently shown that short-term weight loss among overweight and obese women undergoing infertility treatment does not improve a woman's probability of live birth. The observational evidence among women attempting to conceive without medical assistance also suggests limited benefits of weight loss on fecundity or pregnancy loss. In contrast, substantial weight gain between consecutive pregnancies, in the year prior to pregnancy attempt, and throughout adulthood appears to be harmful for not only time to pregnancy but also pregnancy maintenance. Future research focused on efforts to prevent weight gain during adulthood is needed to better understand whether these types of interventions may have beneficial effects on fertility.
Collapse
Affiliation(s)
- Audrey J Gaskins
- Department of Nutrition, Harvard T.H. Chan School of Public Health, 665 Huntington Avenue, Boston, MA, 02115, USA.,Channing Division of Network Medicine, Brigham and Women's Hospital and Harvard Medical School, 181 Longwood Avenue, Boston, MA, 02115, USA
| |
Collapse
|