At the 14-year follow-up visit, following their report of current alcohol use, mothers were asked if they drank alcohol during pregnancy. If a mother reported prenatal alcohol use she was asked to think back to a typical week during pregnancy and describe what she drank at each day during the week. Mothers were also asked if there were periods of time they drank more or less. Different drinking patterns were averaged across pregnancy. For example, a woman may have drunk heavily during the first 12 weeks, drank lightly or moderately for the next 18 weeks, and then abstained from alcohol for the last 10 weeks. An AAD measure was constructed for each time period and then pro-rated for pattern duration and averaged. In certain instances (N=22), the child’s current caregiver was with the biologic mother frequently during pregnancy and reported being able to describe the biological mother’s alcohol drinking patterns during pregnancy.
