I didn't have babies until I was 37. I wasn't sure I wanted them but I did fall for the fertility-nagging-concern-trolling that is current in the mainstream misogynist media - I believed that by delaying I might be nixing my chances altogether, and I would not have, if I had thought that having children was the number one priority in my life.
Had I thought that, I would have taken steps to have them sooner, and would effectively have killed my career, as a variety of factors kind of stalled it in my late twenties to mid thirties, and it was only hard graft and consistent determination over a crucial few years, where some opportunities came up and I threw myself at them with everything I had, that set it on an even keel. By the time I had my first baby at 37 I was in a permanent job with maternity rights and a salary that put me well in the black after childcare. This was my absolute first time in my life that I was in this position.
If I had had children in my late twenties or early thirties I would be financially dependent on a man (actually some shit man, given who either the fathers would have been) and / or the state, and in a bit of a hole about getting a career started again. I can see how it happens and it really sucks.
and we have to be careful not to blame individual women for this. it is systemic.
I haven't read "Lean In" but I really don't think I want to. having read the intro (kindle sample) and several reviews and the odd discussion of it on here, I think I would find it an extremely annoying book, because its argument seems to be to accept a lower reward:labour ratio if you are a woman. Its thesis appears to be that if you are a woman, things are stacked against you and therefore you must work harder and be cleverer. This is absolutely wrong. It totally shits on those who have no more to give.
I come at this very much from the angle of a person with medium to low stamina. I accept that some top jobs demand the utmost stamina, I know that some people in law etc get used to working 17 or 18 hour days sometimes for long stretches, and I will never be one of those people and can't expect to be paid as such. BUT I do resent the implication that everyone could, that energy is infinite, that the answer, as Boxer thought, is "I will work harder". look what happened to him.
I am at a really difficult time in my life with competing demands and no support, including or especially at home (although I theoretically have a partner) and I could cry at the disparity between what I can see could be done, by me, and what I can do.