Of the 858 women enrolled in MOAD at the time of analysis, 812 (95%) had complete information regarding breastfeeding initiation at all deliveries. Of the 812 women, 585 (72%) were multiparous at enrollment: 429 reported two births and 156 reported 3 or more births. In all, the 812 women reported a total of 1,574 births. The majority of participants were Caucasian (84%) and only 3 women reported Hispanic ethnicity. Participants were relatively well educated: 350 (43%) had a college degree and 275 (34%) had a graduate degree. Median age was 32 years.