I would wait. I know you have a young baby, and having puppies with the baby will be really hard. Not the taking care of the puppies, but more so, having the baby and puppies together. If you have 8 puppies, they "potty" everywhere, and if you work outside of the home your wife is going to have to keep that cleaned up so the baby dosent get into it, and i'm sure with a new baby she would be exhausted. puppies are also very mouthy, and play rough. They arent mean, but puppies play, and will knock over the baby (chasing one or 2 is easy, a rowdy crew of 8 or so is hard to get to when they are all going in different directions) they are also going to be mouthy with the baby, and probably knock the little one over, not to mention chew its toys up. I vote wait until atleast the next heat, so your wife can spend all her quality time with the new baby for now.