I'm about to get married and my fiance and I have not talked about having children. I worry about starting this conversation with him - I want many babies and he seems disinterested! How should I do this?

I agreed with most who recommend that you should talk about it before the big day. I'll just share a real life experience here. My ex boss wanted babies too but his wife didn't. They didn't talk about this before marriage. He was unhappy for years as he really wanted kids. once he asked if I know the meaning of Family. It's "Father and mother I love you" and said his is incomplete with kids. In the end, they got divorced. So to avoid being like my ex boss, raise the topic before the big day.