Kind of. Here's the actual line from the PNAS article: “Although the reasons for this attrition are not well understood, it appears to have less to do with di

Kind of. Here's the actual line from the PNAS article: “Although the reasons for this attrition are not well understood, it appears to have less to do with discrimination or ability than with fertility decisions and lifestyle choices, both freely made and constrained. The tenure structure in academe demands that women having children make their greatest intellectual contributions contemporaneously with their greatest physical and emotional achievements, a feat not expected of men. When women opt out of full-time careers to have and rear children, this is a choice—constrained by biology—that men are not required to make Your claim that the problem "really is sexism" is unsupported by evidence. The article seems to be claiming that the primary impact is the physical and biological constraints of being a mother.