Believe me, I've considered it. For now, I'm content to take over parenting for a good chunk of the weekend, which gives the working mama a break and chance to prep for the next week. I'm banking on a big enough exit imminent before the baby hits 4 years old so that I never have to work again if I don't want to.

Failing that rough time frame, it's off to a big firm or government where hours are tightly defined. As you're alluding to, time is too precious a resource to squander. I joined this last company not long ago and I'm very enthusiastic about it, but this is the last start-up I can see myself doing. Unless someone is independently wealthy, I don't see how the commitment it takes is an acceptable sacrifice for a full and satisfying life once kids come into the picture.