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Fertility Glossary

Sperm morphology

The proportion of sperm with a normal shape.

Male fertility

Morphology is assessed against strict criteria, and even in fertile men only a small percentage of sperm are perfectly formed, so a low percentage is common and often less significant than it sounds. It is one part of the overall picture and rarely a reason for treatment decisions on its own.

Also known as: teratozoospermia, sperm shape, normal forms

Sources

  • WHO laboratory manual for the examination and processing of human semen (who.int)
  • Healthy Male (healthymale.org.au)

Last reviewed: 10 September 2026. Written by the Antega Editorial Team. General information only โ€” always follow the advice of your own clinic, doctor or pharmacist.

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