Given how infectious lycanthropy is, that doesn't feel right. That said, werewolf infants are problematic -- silly at best and raise the specter of killing a one-month-old baby at worst.If the werewolf is a natural werewolf, you have two choices. You could decide that the natural lycanthropy only passes to the child if both parents are also lycanthropes at the time of insemination. In this case, the child is, again, normal/uncursed. If you decide that it doesn't require both parents to be lycanthropes, you can let the dice decide, 50/50.
Given how infectious lycanthropy is, that doesn't feel right.
Curse of Lycanthropy (Su): Any humanoid or giant hit by a natural lycanthrope’s bite attack in animal or hybrid form must succeed on a DC 15 Fortitude save or contract lycanthropy. If the victim’s size is not within one size category of the lycanthrope the victim cannot contract lycanthropy from that lycanthrope. Afflicted lycanthropes cannot pass on the curse of lycanthropy.
That said, werewolf infants are problematic -- silly at best and raise the specter of killing a one-month-old baby at worst.
I'd say that the disease remains dormant until puberty, which lines up with most werewolf stories. (The adorable werewolf husky/toddler on "True Blood" aside.)