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?

It's a difficult and uncomfortable conversation, but it absolutely must happen. Whether or not to have children is a deeply personal choice and for a lot of people, not a place to compromise. Agreed with a few of the other replies here that you should bring it up in a private place. Best of luck!