Sperm Motility Analysis by Computer-Assisted Semen Evaluation (Microcomputer-Assisted Sperm Analysis, MASA)

Why This Test Is Done

Your healthcare provider may recommend this test if you or your partner have trouble getting pregnant, unexplained infertility, or if you’ve had repeated miscarriages. It can also be part of a general fertility workup or after exposure to certain medications or environmental factors that might affect sperm health.

What to Expect Before the Test

You’ll need to provide a semen sample, typically collected through masturbation in a private room. Avoid ejaculation for 2–5 days before testing to ensure accurate results. Wear a condom if you’re sexually active during this period to prevent contamination.

How the Test Works

A specialized microscope or automated system analyzes your semen under a microscope. The test evaluates sperm movement patterns, speed, direction, and overall motility, often expressed as a percentage of motile sperm cells.

What the Results Mean

Results are qualitative (not numeric) and describe sperm motility characteristics, such as whether sperm are moving actively, progressively, or non-motile. Low motility or abnormal patterns may indicate underlying fertility concerns that need further evaluation.