My guess is that nothing is written in stone! I also stated for years I would NEVER get married or have kids. I think though now if I met Mr Right things would change. I am no longer as closed minded about either now.
But I would have to agree with Maria, "it depends", some just dont want any!
In a way, I dont blame them , I mean look at this world!! On the other hand, my parents say there is nothing better in the world than a child of your own, on the other hand.....well there is no other hand! ** Sorry, "fiddler on the roof" flashback!!