How Is Sperm Produced? - Healthline
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Medically reviewed by Stacy Sampson, D.O. — Written by Scott Frothingham on June 13, 2018- Where
- How
- How long
- Takeaway
A man’s reproductive system is specifically designed to produce, store, and transport sperm. Unlike the female genitalia, the male reproductive organs are on both the interior and the exterior of the pelvic cavity. They include:
- the testes (testicles)
- the duct system: epididymis and vas deferens (sperm duct)
- the accessory glands: seminal vesicles and prostate gland
- the penis
Where is sperm produced?
Sperm production occurs in the testicles. Upon reaching puberty, a man will produce millions of sperm cells every day, each measuring about 0.002 inches (0.05 millimeters) long.
How is sperm produced?
There is a system of tiny tubes in the testicles. These tubes, called the seminiferous tubules, house the germ cells that hormones — including testosterone, the male sex hormone — cause to turn into sperm. The germ cells divide and change until they resemble tadpoles with a head and short tail.
The tails push the sperm into a tube behind the testes called the epididymis. For about five weeks, the sperm travel through the epididymis, completing their development. Once out of the epididymis, the sperm move to the vas deferens.
When a man is stimulated for sexual activity, the sperm are mixed with seminal fluid — a whitish liquid produced by the seminal vesicles and the prostate gland — to form semen. As a result of the stimulation, the semen, which contains up to 500 million sperm, is pushed out of the penis (ejaculated) through the urethra.
How long does it take to produce new sperm?
The process of going from a germ cell to a mature sperm cell capable of egg fertilization takes around 2.5 months.
The takeaway
Sperm are produced in the testicles and develop to maturity while traveling from the seminiferous tubules through the epididymis into the vas deferens.
- Parenthood
- Pregnancy
How we reviewed this article:
SourcesHistoryHealthline has strict sourcing guidelines and relies on peer-reviewed studies, academic research institutions, and medical journals and associations. We only use quality, credible sources to ensure content accuracy and integrity. You can learn more about how we ensure our content is accurate and current by reading our editorial policy.- Hirsh IH. (n.d.). Structure of themale reproductive system.https://www.merckmanuals.com/home/men-s-health-issues/biology-of-the-male-reproductive-system/structure-of-the-male-reproductive-system
- Male reproductive system. (n.d.).https://kidshealth.org/en/parents/male-reproductive.html
- SEER Training: Anatomy of thetestis. (2009).https://training.seer.cancer.gov/testicular/anatomy/
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