Why you might see this term
A low percentage can sound alarming, but strict assessment means many sperm may not meet every shape criterion even in samples from fertile people.
What to keep in mind
Morphology alone does not establish infertility or dictate treatment. It is different from a test of sperm DNA.
Sources & further reading
Prepared by ProFertility · Updated 23 October 2026.
Educational information based on the linked sources. This explanation is not an individual diagnosis or a treatment recommendation. A term appearing here does not mean the test is necessary or included in a particular kit.
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