Current Body Mass Index Is Associated with Reported Weight Gain as a Reason for Discontinuing Oral Contraceptive Pill...

Concerns about weight gain are commonly cited with combined oral contraceptive pill (COCP) use, yet it remains unclear whether perceived weight gain as a reason for discontinuation differs by body mass index (BMI). We analyzed data from the 2017-2019 National Survey of Family Growth (NSFG), including 3709 non-pregnant women aged 20-49 years who had ever used COCPs and had BMI calculated from self-reported height and weight. Trained NSFG staff interviewed participants on reasons for discontinuation and coded them into predefined categories, including weight gain. Discontinuation was examined by BMI category (underweight, normal weight, overweight, obesity) using survey-weighted logistic regression adjusted for demographic and socioeconomic covariates. Overall, 35.2% (95% CI 32.3-38.1%) of women reported discontinuing COCPs due to dissatisfaction, with 20.2% (95% CI 18.1-22.3%) citing side effects. Weight gain was reported by 7.0% (95% CI 5.6-8.4%) of ever-users, with higher prevalence among women with overweight (8.4%) and obesity (7.7%) compared with normal-weight women (5.5%). In adjusted analyses, women with overweight (aOR 1.76, p = 0.048) and obesity (aOR 1.68, p = 0.033) had higher odds of COCP discontinuation due to self-reported weight gain. These findings highlight the importance of addressing weight-related concerns during contraceptive counseling, particularly for women with higher BMI.