Out of the 55 women who started the study, 7 did not complete the study (6 due to lack of interest or schedule problems, 1 became pregnant) and another 3 completed the study, but their hormone levels indicated that the experimental sessions were not conducted during the correct menstrual cycle phases. Thus, data from 45 women were analyzed: 21 FHN women and 24 FHP women. Attempts were made to match the two groups on age, race, level of education, as well as their current and lifetime patterns of other drug use.
