That's a pretty big assumption.
Would she have been legally required to inform them before being hired?
Unfortunately, the end result is that someone gets screwed either way: either the child misses out on his mother's attention during the most crucial moments of his growth, or Yahoo gets a CEO who isn't focused on restoring Yahoo.
Your statement implies that a woman can not do both. I know my wife would strongly disagree. I suspect many others would too.
http://postcards.blogs.fortune.cnn.com/2012/07/16/mayer-yaho...
> Mayer first disclosed to the Yahoo board that she is pregnant in late June, in a meeting with Michael Wolf, a member of the board's four-person CEO search committee. A meeting with the search committee followed, and then Mayer met with the full board last Wednesday. None of the Yahoo directors, she says, revealed any concern about hiring a pregnant chief executive. "They showed their evolved thinking," says Mayer, who got the phone call last Thursday that she was the board's choice to be CEO.
1) Steve Jobs took a lot of 'time off' over his last few years where he had to take a big step back. Apple could afford it because he dominated their culture even when he wasn't there.
2) I think the next year at Yahoo, if all goes as Yahoo investors would like, is more important existentially than the last year of Jobs tenure. I'm not saying the last year under Jobs wasn't big, but there is more pressure on her than Jobs had to do more to change the company.