A teen is asking about "undescended testicle" This case was asked by a teen with Dr. Jatin S 3 years back. Teen's quote: "Hello sir, a teen 23 year old, male. Every male has two testis and some male have only one and I have the same problem. May I know the reason behind this ? And please tell me the advantages and disadvantages of this I seriously need this answer." Physical check was done.The testicle is on left top pelvis. Rarely there is a pain. I request the experts team to advise him or suggest him a medical advise. Thanks, Ansar Syed. Young Member, Faculty Of Medicine.