You can go on www.babydow.com and you can grow babies but not with a boy you take care of one baby at a time and you have to feed them, bath/Change them, play with them, put them to bed, enroll them in a daycare, and more so come on over to babydow.com.
Babydow is now closed.
Well do you mean virtual baby sites? If you do then try cyberinfants.com, I googled searched virtual baby sites and that came up. And I heard in IMVU and Second Life you can have kids but I don't play IMVU or Second Life so I'm not sure about that one.