I want a baby, he doesn't

So my husband and I agreed on when we would start ttc when we got married. We are a month away from the big day we agreed on and he has been avoiding the subject whenever I bring it up. I finally got him to talk about it as he says that he just doesn't feel ready. I asked him what is making him feel like that and he says he isn't sure. I told him I respect his opinion and feelings. I also said that I don't feel like anyone ever feels perfectly ready to be a parent for the first time.