Careers & having a family: Do they mix?

I found this Conture - a magazine/website for architects. The article explores the gender gap in top management. The writer makes this point:

'An additional obstruction for women, especially those interested in attaining top management positions, are the concomitant issues of child-bearing and child-raising at the crucial time in their careers when they either have to choose to have children or forgo them to pursue their careers. Men do not have that worry since, the world over, men still do not perform primary care duties, which also happens to be both unpaid and domestic labor.'