—By Alison McCook

Katherine Gerull was tired. As a third-year medical student at Washington University School of Medicine in St. Louis, she was tired of hearing comments about the career choices that she and her female colleagues had made. What sort of mom will you be? Your husband studies medicine as well, so why don’t you just stay home? You’re too pretty to be a doctor. “The [comments] are seemingly harmless,” Ms. Gerull said. “But as they accumulate over a