Health Library Home>Disease, Condition, & Injury Fact Sheets>Article

Undescended Testes


How To Say It: kript-or-kid-ISM


An undescended testicle (cryptorchidism) is when a boy's testicle does not move down into the scrotum. Testicles develop inside the abdomen before birth. They move down into the scrotum just before or after birth.

Undescended Testicle

Copyright © Nucleus Medical Media, Inc.


It is not always known why this happens. It is thought to be a problem with the way the testicles develop.

Risk Factors

Things that may raise the risk of this problem are:

  • Low birth weight
  • Being born too early
  • A family history of undescended testicles
  • Klinefelter syndrome or other chromosomal problems
  • Factors in the mother during pregnancy, such as:


The main symptom is not being able to see or feel the testicle.


You will be asked about your child's symptoms and health history. A physical exam will be done. It will focus on the testicles. This is often enough to make the diagnosis.

Images may need to be taken to locate the testicle. This can be done with ultrasound or laparoscopy.


Treatment is needed to avoid problems, such as infertility and testicular cancer.

Choices are:

  • Waiting for the testicle to descend on its own
  • Surgery to move the testicle down and stitch it into place
  • Hormone therapy (not common)


There are no current guidelines to prevent this problem.


Healthy Children—American Academy of Pediatrics

National Infertility Association


Fertility Matters

Health Canada


Cryptorchidism. EBSCO DynaMed website. Available at: Accessed December 10, 2020.

Tekgul S, Dogan HS, et al; European Society for Paediatric Urology and European Association of Urology (ESPU/EAU). Guidelines on paediatric urology. EAU 2017 Mar.

Undescended testicles. Family Doctor—American Academy of Family Physicians website. Available at: Accessed December 10, 2020.

Undescended testicles. Healthy Children—American Academy of Pediatrics website. Available at: Accessed December 10, 2020.

Last reviewed September 2020 by EBSCO Medical Review Board Chelsea Skucek, MSN, BS, RNC-NIC