Obesity but Not Polycystic Ovary Syndrome Associated with Decreased Breastfeeding Initiation Rates

To determine whether women with polycystic ovary syndrome (PCOS) were less likely to initiate breastfeeding or have shorter breastfeeding duration. Cross-sectional analysis was performed of the Pregnancy Risk Assessment Monitoring System dataset, a national questionnaire from the Centers for Disease Control and Prevention of postpartum women, from 2016 to 2018. Logistic regression assessed the odds of any breastfeeding initiation. Cox proportional hazards assessed duration of any breastfeeding. Sample included 2,382,290 women (6.1% PCOS). In univariable analysis, PCOS was associated with increased odds of any breastfeeding initiation (89.9% versus 87.9%; odds ratio [OR]: 1.23 [95% confidence interval: 1.02, 1.47]; p = 0.03). This outcome remained significant after controlling for body mass index (BMI; OR_adj: 1.3 [1.1, 1.6]; p = 0.005) but not after controlling for education and prior live births (OR_adj: 1.10 [0.89, 1.37]; p = 0.37). With increasing BMI, the odds of any breastfeeding initiation decreased, with the lowest odds seen in women with class III obesity (OR_adj: 0.74 [0.60, 0.9]; p = 0.003). In a subanalysis of racial/ethnic groups, PCOS did not impact any breastfeeding initiation in White or Black non-Hispanic groups but increased odds of any breastfeeding initiation in Hispanic women (OR_adj: 2.0 [1.1, 3.7]; p = 0.03). In multivariable models, there was no difference in the duration of any breastfeeding in women with PCOS compared with those without. Understanding predictors of breastfeeding success is paramount. In this national survey measuring any breastfeeding, PCOS did not decrease breastfeeding initiation or duration, despite confirming the association between overweight/obesity and decreased breastfeeding. However, because the data did not distinguish between exclusive breastfeeding and supplementation, we cannot rule out the possibility that PCOS affects breastfeeding exclusivity or necessitates supplementation. This limitation suggests that important trends could be obscured, and therefore, our findings should be interpreted with caution regarding breastfeeding exclusivity. Interventions aimed at increasing breastfeeding should target populations that would benefit the most; our data support that PCOS-specific targeting is not needed. Additional prospective studies are necessary to fully understand the association between different PCOS phenotypes and breastfeeding.