Abstract
BACKGROUND: Little is known about breastfeeding initiation and duration in the context of postpartum marijuana use and safety beliefs. RESEARCH AIMS: (1) To describe characteristics of women who used marijuana postpartum; (2) to evaluate the relationship between postpartum marijuana use and breastfeeding behaviors; and 3) to assess, among women who used marijuana postpartum, how safety perceptions are associated with breastfeeding behaviors. METHODS: Data from the cross-sectional Pregnancy Risk Assessment Monitoring System, a United States national governmental survey, 2017, were analyzed for participants with infants aged ≥ 12 weeks (seven states, unweighted N = 4604). Chi-square tests were used to compare characteristics and counseling for postpartum marijuana use. For participants with postpartum use, adjusted prevalence ratios (aPR) were calculated to evaluate relationships between safety perceptions and breastfeeding initiation and duration. RESULTS: Overall, 5.5% (95% CI [4.6, 6.6]) of participants reported postpartum marijuana use; among these women, 47.2% (CI [37.6, 56.9]) were breastfeeding at the time of the survey. Overall, 25.7% of participants indicated that they had been advised, by their prenatal care provider, against marijuana use while breastfeeding. Breastfeeding initiation or duration did not differ by postpartum marijuana use. Among participants with postpartum use, those who perceived marijuana was safe for breastfeeding women to use were more likely to have breastfed (aPR = 1.22, CI [1.04, 1.43]) and have a breastfeeding duration > 12 weeks (aPR = 1.57, CI [1.08, 2.27]) compared to those who perceived it to be unsafe. CONCLUSIONS: Understanding maternal safety beliefs and provider education about the latest evidence and guidance related to postpartum marijuana use may improve clinical care.