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Semen

Semen is a thick, cloudy, white fluid that contains sperm. Semen is usually released, or ejaculated, from the penis during a sexual climax (orgasm).

The amount of semen ejaculated varies from between a few drops to about 1 tsp (4.9 mL) and usually contains between 40 million and 600 million sperm.

Current as of: May 1, 2026

Author: WebMD Ignite Staff

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All WebMD Ignite education is reviewed by a team that includes physicians, nurses, advanced practitioners, registered dieticians, and other healthcare professionals.

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