Maternal Prepregnancy Body Mass Index, Gestational Weight Gain, and Cessation of Breastfeeding: A Systematic Review and Meta-Analysis

Background: Suboptimal breastfeeding, a major factor of maternal and child morbidity and mortality, has been reported around the world. Maternal weight status, as a significant variable influencing breastfeeding outcomes, needs to be studied sufficiently. Objective: This review is to explore the effect of different prepregnancy BMI and gestational weight gain (GWG) categories on breastfeeding initiation and cessation. Methods: Cohort studies were systematically searched in Embase, Web of Science, PubMed, and CINAHL databases from database establishment to February 2019. Summary risk ratio (RR) on breastfeeding initiation and cessation was estimated with the use of a random-effects model. Results: Thirty cohort studies were included in meta-analysis. Prepregnancy obesity was a risk factor for breastfeeding initiation (RR 1.49, 95% CI [1.33-1.67]), exclusive and any breastfeeding (ABF) duration (RR 1.26, 95% CI [1.17-1.36]; RR 1.34 95% CI [1.16-1.56]). Inadequate GWG was a risk factor for breastfeeding initiation (RR 1.27, 95% CI [1.08-1.49]). Excessive GWG was a risk factor for ABF duration when women were prepregnancy overweight and obese (RR 1.42 95% CI [1.32-1.53]; RR 1.89 95% CI [1.13-3.17]). Conclusion: If women are obese before pregnancy or gain excessive/inadequate weight during pregnancy, they are less likely to initiate and continue breastfeeding according to recommendation time. Hence, guidance about proper weight management to reproductive age women and consultation about recommended GWG to pregnant women should be fully implemented to improve breastfeeding practices. Besides, future research needs to find out the association between prepregnancy underweight status and breastfeeding outcomes.