To be honest, I've never had this burning desire to have kids, but I think it would be a good idea for both you and your BF to ask yourselves this: what is it about kids that I want, or think I want? Wanting kids in the abstract is very different from being fully aware of all of the challenges that raising them entails and wanting to have them anyway. And, is he thinking of the impact to a child to have older parents? Is he going to want to chase around someone in their terrible twos when he is 52? He's going to be a senior citizen when they graduate high school. It's an irrevocable decision, moreso than marriage. Think it through carefully.