Join Date: Jun 2008
Location: northern Minnesota
Unfortunately, we can't tell anything from your photos because your cat's long hair and the fuzziness of the photos themselves prevent us from clearly seeing the area. There is a second opening below the anus. In a male cat, that lower opening is small and circular. In a female, the lower opening is a small, vertical slit. The distance between the two openings is greater in a male than in a female.
If you want to try to take pics again, you're going to need to either shave the area or part the hair so that we can see the shape of and distance to the lower opening. You're also going to need to use a camera with a macro setting that will allow you to take clearly focused, close-up photos.
Or, you can assume that your vet's best guess is correct.