Undescended testicles

Also called Cryptorchidism or Undescended testis

Undescended testicles is when one or both testicles are not in their normal place in the scrotum. It is common in baby boys, especially those born early. In many cases the testicle moves down by itself within the first 3 to 6 months. It is checked at the newborn and 6 to 8 week checks.

Last updated Nov 9, 2026

What it is

If the testicle has not moved down by about 6 months, a small operation called orchidopexy is usually done, ideally before 18 months.

Treatment lowers the risk of fertility problems and testicular cancer later in life, and makes the testicles easier to check.

Common signs

  • A scrotum that looks small or uneven
  • A testicle that cannot be seen or felt in the scrotum

How it is usually diagnosed

  • Examination at baby checks
  • Sometimes an ultrasound or keyhole surgery to find the testicle

Records worth keeping

Keeping these together makes each appointment easier, especially when you see a new doctor:

  • Newborn and baby check notes
  • Paediatric surgery letters
  • Operation notes

Questions to ask your doctor

  • Is it likely to move down by itself?
  • When should surgery be done?
  • Will it affect fertility later?

When to get help right away

Call 112 or go to the nearest emergency department if you have:

  • Sudden severe pain or swelling in the groin or scrotum: call 112 or go to the emergency department

This page is general information. It is not a diagnosis and does not replace a doctor who knows your history. Medfold keeps your records organised; it does not interpret them.

Sources