Now that we have a baby, it seems it's the only thing my husband wants to talk to me about. We seem to have lost our previous spark. How do you reignite your previous relationship with a baby in the middle?

Honestly, I think it's amazing that he shows that he truly care about the baby, his family. It is expected that his attention will be divided, but eventually you can bring it up to him and talk about the connection between you two. I don't see it as a big issue, as he sounds he genuinely care about the person he loves and maybe he just didn't notice that you are feeling abandoned at this point of time.