How is it not a gendered issue? Women are generally expected to be the primary childcare providers, and if you can't afford a nanny, the wife is going to be the one who does most of the childcare.
Any woman who chooses to spend the majority of her waking hours engaging in non-work activities did so knowing full well it will probably harm her career.
If she didn't want to do this, she could have freely chosen to a) not have children or b) have children with an unambitious man willing to become a full time parent.
If you want to argue that women are somehow "defective" because they prefer children to careers, be my guest. But it is dishonest to call it a glass ceiling - that phrase usually implies it's something inflicted on her by other people.
She could also have children with a man whose ambition is to raise children. (Don't make the mistake of thinking stay-at-home parents lack ambition! It's just directed at kids rather than money, power, or fame.)
