Yes, we recommend trapping and spaying pregnant cats. Animal Care and Control euthanizes more feral kittens than any other animals and we are flooded with kitten admission requests throughout the year. Female kittens may start to mate as young as four months of age, and the queens may start to mate again about 8-10 weeks after delivery. It is important to understand that the cat is not emotionally connected to her unborn kittens. She reproduces out of instinct. If anything, birthing kittens brings more stress to her life as she needs to work hard just to survive on her own. On the other hand, it would be traumatizing to her to take away her kittens after they are born and it is a lot of work to hand raise kittens. If a cat seems very pregnant, or you know she is due within one week, there are some risks involved with spay/abortion but our veterinarians take extra precautions to make sure the surgery is done safely. We have never had a problem performing a spay surgery on a pregnant cat.