I did not intend to breed them just yet. I was going to have the umbilical cord hernia repaired first. She had a puppy diaper on and was on a leash while I slept. Somehow they got to eachother and they were tied in the "lovers knot" when I woke up this morning. I know pregnancy can be bad for a dog with an umbilical cord hernia but I don't know what to do. Please only serious advice. The dog can be repaired and spayed while she is pregnant? Or will the pregnancy be terminated? Let me make this clear - I am not a breeder or want to be part of a puppy mill. I am just a shih tzu owner and love the breed. I was planning to have the hernia fixed before breeding them. My female is almost two years old. I have done all the research about breeding, mating, whelping puppies and had started make the proper arrangements and getting the appropriate supplies. I know the puppy diaper wasn't supposed to prevent pregnancy! I just thought it would act as a barrier so that my male wouldn't be able to penetrate her. Some how he was able to pull the diaper completely to one side exposing the vulva. He hadn't fooled with the diaper before so I thought he wasn't smart enough to figure it out. We all sleep in my bedroom at night and they had never tried any funny business before. I realize the seriousness of this situation and will take her to the vet immediately.