Why you might see this term
It may help clarify a sample where many sperm are not moving. This answers a different question from motility.
What to keep in mind
Vitality is not included in every semen assessment. A percentage of live sperm is not a personal probability of achieving a pregnancy.
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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