On insidehighered:

[…] the story favors men in academe, said Goulden. “Certainly our most important finding has been that family negatively affects women’s, but not men’s, early academic careers. Furthermore, academic women who advance through the faculty ranks have historically paid a considerable price for doing so, in the form of much lower rates of family formation, fertility, and higher rates of family dissolution.” For men, however, the pattern has been either neutral or even net-positive.

For women in academe, said Mason, “At every stage, there’s a ‘baby penalty.’ In the earlier stages, graduate students have children and drop out or grad students get turned away from the academic profession, in terms of the [lack of family-friendliness] they see around them.” Concerns about time demands in relation to caretaking, and worries that advisers, future employers and peers would take their work less seriously were all reasons female Ph.D. students, more than male, cited for not having a child or being uncertain about having a child in one survey of graduate students in the University of California system. In another survey of postdoctoral fellows in the system, more than 40 percent of women who had children during their fellowships were considering changing their career plans to those outside academic research, compared to 20 percent of childless women with no plans for children. [Rest.]