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Spermatozoa (sperm) are the male sex cells that carry a man's genetic
material. They are so tiny that they can't be seen without a microscope. In a healthy man, one ejaculation usually contains between 40 million and 600 million sperm.
Sperm have an oval head, a short middle, and a long tail. They move by whipping their tails. A sperm fertilizes a woman's egg (ovum) by breaking through the
membrane that surrounds the egg.
Sperm develop in a man's
testicles. They are added to semen before a man ejaculates.
ByHealthwise StaffPrimary Medical ReviewerE. Gregory Thompson, MD - Internal MedicineAdam Husney, MD - Family MedicineSpecialist Medical ReviewerAvery L. Seifert, MD - Urology
Current as ofAugust 22, 2016
Current as of:
August 22, 2016
E. Gregory Thompson, MD - Internal Medicine & Adam Husney, MD - Family Medicine & Avery L. Seifert, MD - Urology
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