In Focus:

Is home sperm test useful or not?

Home sperm tests measure sperm count — the number of sperm in the fluid (semen) ejaculated during an orgasm. These tests seem to be effective at measuring sperm count — one study sponsored by a test manufacturer found the test did as well as a lab count of sperm 95 percent of the time. But sperm count is only one factor in a man's fertility.

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