Extended Maternity Leave and Breastfeeding in Active Duty Mothers

In 2016, the Department of Defense extended maternity leave from 6 to 12 weeks for active duty mothers to support breastfeeding initiation and duration. Limited data exist regarding the impact of prolonged maternity leave. Our objective was to evaluate the prolongation of maternity leave on the initiation and duration of breastfeeding in active duty mothers.

In this single-center retrospective cohort study, we used data collected from Department of Defense electronic health care records of infants born to active duty mothers who were delivered during calendar years 2014 and 2016. The primary outcomes were initiation and duration of breastfeeding and breastfeeding exclusivity evaluated throughout the first year of life. Secondary outcomes were differences in breastfeeding rates between military-branch affiliation and military rank.

No changes in breastfeeding initiation occurred between the 2 cohorts (n = 423 and 434). However, an increase in breastfeeding establishment was identified at the 2- (81.5% vs 72.4%; P = .002), 4- (70.5% vs 56.7%; P < .001), 6- (60.3% vs 46.5%; P < .001), and 9-month (45.4% vs 34.9%; P = .003) visits in the 12-week leave cohort. Exclusive breastfeeding increased at 2 (56.4% vs 47.2%; P = .007), 4 (47.5% vs 36.4%; P = .001), and 6 (37.3% vs 29.3%; P = .016) months.

Increases in maternity leave correlated with increased breastfeeding duration and exclusivity through 9 months for active duty mothers. These data support the benefit of extended maternity leave in the military and the need for future studies to validate findings at other military treatment facilities.