My baby boy was also born with an undescended testicle - its actually more common than we thought, about 3% of baby boys are born that way! The doctor told us that they usually descend within 2 months after birth and definintely within a year. They could feel his testicle though, so they weren't worried tht it wasnt there, and it descended on its own by about a month and a half old. Although at 7 mos old, its still "shy" LOL, and isn't there every time I change his diaper! They did say that if the testicle hadn't descended by 1 year, then there was a quick and easy surgery they could to to bring it down. It sounds like with your boy they aren't even sure is he has a second testicle? If he is 14 mos and it still hasnt dropped on its own than it sounds like surgery is neccessary, although I would be careful though, because in all honesty, men can function just fine with only one testicle, they really dont need to have two. I understand your concern about him being made fun of or stared at ect, but I don't think its very well founded, because honestly how many people will ever be close enough to him to be able to tell he only has one? Even in the locker room guys dont get that close to eachother. The only time it would be noticed is when he is getting intimate with a girl, and i really dont think it would hinder him in that area at all either (I mean, if he is getting intimate with someone, hopefully he will know her well enough that she wouldnt laugh at him or mock him?)
My other question about a prosthetic testicle, is how big would it be and when would they put it in? If they put in an adult-sized testicle when he is little than atleast he wouldn't have to get surgery more than once, but he would also have a HUGE testicle for his whole childhood, which would probably be more noticable in the locker room then if he was missing one. I don't know al the ins and outs of getting a prosthetic teticle, but it seems that they would either have to do the surgery twice so it would be somewhat the right size for the rest of his body, or they would have to implant it when he hits puberty, and it thats the case then he will be old enough to give his opinion on the matter. He may like it the way it is or he may want to change it, but then atleast its his decision. Well. I hope I helped. Good luck with everything!