The woman I got my trio's from 5 days ago threw in a pregnant rat to give me a jump start on the project. She gave birth last night. I'm not sure how many are in there, but when I got up this morning, it looked like more than 10 little jellybeans that I could see sticking out from under mom. All of the rats are now piled on top of the babies so I can't get a good picture. I don't want to bother them just yet.
This is probably not so exciting to anyone who keeps these things and has seen babies in their tanks before, but its a first for me and I am very excited. I think I'm getting a little obsessed with these little guys.