For the baby's sake, let's hope so!

As a parent myself, I know that the first few months of parenthood are difficult and life-changing, regardless of how many nannies one might afford.

And yet I have never seen anyone post their concerns when a Male CEO becomes a father. I wonder why that is...

They should. There are indications that becoming a parent lowers testosterone levels in men.

If you want to pretend, for political correctness' sake, that we're not largely slaves to our hormones, have fun with that.

I wrote some of the best, most creative code of my life in the first 6 months after my son was born. I was focused, and yet could work on multiple project simultaneously very effectively.

I got hardly any sleep, so if that is "being a slave to my hormones" I'm all for it!

Either way, I think it is fair to say that the effects or parenthood are very unpredictable.

You'll need to offer studies establishing a causal relationship between testosterone levels and technical/business success for the difference to mean anything.

For all we know lower testosterone levels may lead to a heightened business acumen.

It obviously does not affect everyone in the same way, but as a generalization, I would say that becoming a parent clearly makes one a more responsible person.

Surely you're not suggesting that she will be less capable to head Yahoo after she becomes a mother? The first few weeks / months are difficult, but after she adjusts to the 'new normal' that is parenthood, she should be right on track.