If a unfertile tom mated with a fertile a queen Would she always go into false pregnancy? I ask this because I have a f4c male who is possibly fertile and mated with my jungle cat savannah queen. Now her nipples are getting bigger but she is not (although she has has small litters in the past 2-3 kittens). Could this be a false pregnancy? Is there anyway to tell if it is false pregnancy other than a ultrasound?