Undescended Testicle Say: un-DIH-sen-did TESS-tih-kul A testicle is an egg-shaped gland that makes and holds sperm. There are two of them in the sac called the scrotum (say: SKROH-tum) that hangs underneath a boy's penis. When a baby is developing inside his mom, his testicles grow in his abdomen and then drop, or descend, into the scrotum. Undescended testicle is a condition in which one or both of a boy's testicles have not moved into their proper place in the scrotum. The testicle may move down on its own within a few months. If it doesn't, the doctor will do surgery to move it. Back to Articles Related Articles Boys and Puberty On the way to becoming a man, a boy's body will go through a lot of changes, including your body growing bigger, your voice changing, and hair sprouting everywhere. Find out more. Read More For Boys: Trouble "Down There" Boys might feel embarrassed if they get hurt or have a health problem "down there." Find out more in this article for kids. Read More All About Puberty Voice cracking? Clothes don't fit? Puberty can be a confusing time, but learning about it doesn't have to be. Read all about it in this article for kids. Read More PQ: I have a lump on one of my testicles. What should I do? Find out the answer to this personal question! Read More PQ: One of my testicles hangs lower than the other. What should I do? Find out the answer to this personal question! Read More Note: All information is for educational purposes only. For specific medical advice, diagnoses, and treatment, consult your doctor. © 1995-2021 KidsHealth®. All rights reserved. Images provided by The Nemours Foundation, iStock, Getty Images, Veer, Shutterstock, and Clipart.com.