Low sperm count

Also called Oligozoospermia

A low sperm count is when there are fewer sperm in the semen than normal. It is one of the most common causes of fertility problems in couples. Causes include hormone problems, a varicocele, infections, genetic conditions, smoking, alcohol, some medicines and anabolic steroids, but often no cause is found.

Last updated Nov 9, 2026

What it is

Lifestyle changes, such as stopping smoking, drinking less alcohol, keeping a healthy weight and keeping the testicles cool, may help.

Treatment depends on the cause and may include medicines, surgery, or assisted conception such as IVF with ICSI.

Common signs

  • Difficulty conceiving
  • Usually no other symptoms

How it is usually diagnosed

  • Semen analysis, usually repeated
  • Hormone blood tests
  • Scrotal ultrasound
  • Genetic tests, sometimes

Records worth keeping

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

  • Semen analysis reports
  • Hormone test results
  • Ultrasound reports
  • Fertility clinic letters

Questions to ask your doctor

  • Is there a cause that can be treated?
  • What lifestyle changes might help?
  • What fertility treatments could we consider?

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 testicles: call 112

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