That would not be likely as there is no real connection between what is happening in the reproductive system and the inside of the urethra except at the point where it ends to release urine. besides an ectopic pregnancy is itself not an infection.
Ask them. If they are operating 'undercover' they're not going to answer you truthfully anyway.
One must first swallow a fish live. Then the fish must pass through the acids in the stomach, travel the digestive trackt and cope with more very heavy acids and alkalies before being packed and compressed with other faeces into a tube. Then it has to survive being pushed through a very narrow constricting opening. No, I don't think the fish would survive somehow.
Rectum is the scientific term for the last piece of colon of our digestive trackt. It has muscles used to push excrement out of your colon. The rectum is connected to the anus, which is 'the opening'. The muscles used to keep the anus closed is called the sphincter muscle, this is a circular muscle.