leaky pipe phenomenon
n.— «The “leaky pipe” phenomenon describes the tendency of women in science to slip away after each level of study at a far greater rate than men do. There are many explanations for this—competing loyalties, feelings of isolation and self-doubt, a lack of cash or high-level sponsorship.» —“Why female academics drop out” by Peggy Curran The Gazette (Montreal, Canada) Feb. 6, 2007. (source: Double-Tongued Dictionary)