In my case, I just needed to know that everything was going to be okay with the
baby and that despite
having the kid the wife was still interested in
having sex, but not immediately interested in having another kid. Ask if his fears are that you'll get pregnant again and if so then I'd have the talk about when or if you want to have another kid. There's a lot going through his mind and kist being assured of what both of you feel is usually enough to overcome any other problems.