A Question About Babies

[pinefresh730]

I was just playing a game with a family of two, and wanted to have a baby. I the mother conceived one, had a completely perfect pregnancy, got to pick two traits, gave birth at home, all that. It wasn't the first time I've had babies on the sims.
The mother put the baby in the crib to sleep, and then later when the baby needed something, my game glitched. No one could go near the baby. No one could feed it, change its diaper, give it attention, nothing. I even called a baby sitter, and they couldn't even come inside the house!
Eventually the crying got so loud that the parents had to sleep on a park bench just to get away from it. The next day the social worker came and took the baby.

I really wanted to make a family, so I want to try again. But the mother isn't able to conceive, and the adoption agency won't let her adopt because of her first baby getting taken away.
My question is, how long do you have to wait to have another baby after you've had one taken away? I'm pretty new to the Sims 3, and I've looked online everywhere, I can't find an answer, so I came here