Sperm Viability by Flow Cytometry (Male Semen Analysis)

Why This Test Matters for Fertility

Sperm viability is a critical factor in male fertility. While many sperm tests focus on count and movement, this test specifically checks whether sperm cells are alive and capable of supporting a pregnancy. Low viability can indicate underlying health issues or environmental factors that may need addressing.

What to Expect Before the Test

You’ll need to provide a semen sample, typically collected through masturbation into a sterile container. Avoid ejaculation for at least 2–3 days before testing to ensure a representative sample. Your provider may give specific instructions based on your situation.

How the Test Works

The sample is analyzed using flow cytometry, a precise method that separates live and dead sperm cells based on their biological activity. This process doesn’t require special preparation beyond the semen collection itself.

What the Results Mean

Results are expressed as a percentage of live sperm cells. While exact reference ranges vary by lab, a lower percentage may suggest potential fertility challenges that could require further evaluation, such as lifestyle changes, medical treatment, or additional testing.