Wanting another child.

My husband and I have three kids (two together and he has one with an ex). I wanted to have another child, but he says he doesn't want anymore. I would like to try again for a son, but if we had another girl that's a blessings just the same😊 He says he just doesn't want another one and that he is afraid it would be a girl. I try not to let it bother me. But it always comes back up. But I would love to have another child. I don't know sure why I keep wanting this. I'm working now and all the kids are in school now.