Corporate world, women and babies

We just got home from an after work social event featuring the Sizzling 20 under 30 - people that are ambitious and high achievers under 30 years of age. It was interesting but most of all great to meet new people. But it did make me think - why is it that most "succesful" women not have any children. And its unspoken that having children is not the path you should go down if you want to "succeed".
I could rant and rant, but I thought Id post that "thought". :)