Rescuing a cat from the street always comes with a certain risk for a couple extra… surprises. Kittens. We're talking about kittens. You never know if the pretty female cat who adopted you might have a couple of them baking in her belly. Of course, that comes with a whole list of consequences, for you and for the momma, but it does happen. And when the pregnant stray cat you rescued finally has her babies, you deal with that miracle the best way that you know how. If she is actually pregnant.
Some stray cats are just chonky though. As unlikely as it might be for a stray cat who is living off of whatever it can find out there in the big world, some of them still manage to chonk-up. So, if you adopt a cat like that, their size might fool you. It should not fool your vet though. So the fact that this vet thought that not only was this cat a female but that she was a pregnant one when 'she' was, in fact, a 'he' is a unique way to start an adoption.
source https://cheezburger.com/43357189/today-she-jumped-in-my-wifes-car-couple-take-their-newly-rescued-cat-to-the-vet-get-told-that-she-is