The fertility wall explains why women need to take time off to gestate and give birth before they are in their 40's. It does not begin to explain why womeen in their 20s are expected to give up a career that lasts considerably longer than either gestation or giving birth and recovering from it.

That's what the author is failing to discuss. Why do women need to give up their career to _raise_ children when the business of _having_ children takes a tiny portion of the duration of a career in STEM academia.

Do you have an explanation for that?