I adopted a stray cat, and brought her in to get a full work-up. I asked to know if she had any diseases, if she was pregnant, if she was chipped or vaccinated. The vet checked her out, ran blood tests, and told me she was healthy and she could get her shots. The next week I went to get her spayed and chipped at the spay/neuter clinic, and it turns out she was pregnant. They had to terminate the pregnancy because she had been vaccinated while pregnant, and the kittens would have had birth defects and medical issues. The vet at the Animal Hospital didn't check to see if she was pregnant, even after I specifically asked, or overlooked the fact and told me to vaccinate anyway.