Now we We will have her spayed as soon as she can be after the birth. If you have adopted a pregnant rat, be ready for when she gives birth. The nipple test assured me that she is. Her behavior may change at any point -- for example, she may become more aggressive to her cage mates. If you have adopted a pregnant rat, be ready for when she gives birth.The gestation period in rats is just three weeks and pregnancy is normally almost undetectable until the final week. if she is over eight wks old and if you turn her over gently to look at her belly and it is faintly pinkish or if you feel something jiggling, it might be babies. think our queen is having kittens. appreciate the tip about not deworming, because I currrently do it every month. "Thank you so much! I want to be a responsible pet owner." After a mother cat has had her kittens, she becomes protective of her babies and may become aggressive if she feels they are threatened. {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/c\/c8\/Tell-if-a-Cat-is-Pregnant-Step-1-Version-7.jpg\/v4-460px-Tell-if-a-Cat-is-Pregnant-Step-1-Version-7.jpg","bigUrl":"\/images\/thumb\/c\/c8\/Tell-if-a-Cat-is-Pregnant-Step-1-Version-7.jpg\/aid27629-v4-728px-Tell-if-a-Cat-is-Pregnant-Step-1-Version-7.jpg","smallWidth":460,"smallHeight":345,"bigWidth":"728","bigHeight":"546","licensing":"