Mary Ann Mason writes for The New York Times, July 8, 2013
For men, having children is a career advantage, and for women it is a career killer. And women who do advance through the faculty ranks do so at a high price. They are far less likely to be married with children. Among tenured faculty 70 percent of men are married with children compared with 44 percent of the women. Academia is difficult for mothers because of the rigid lockstep career track that puts the greatest pressure on aspirants in their 30s and 40s.