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Learning Center
Delayed ejaculation
Learn what can cause delayed or absent ejaculation and how it can be treated.
Keratoconus
When your cornea bulges outward, it can cause blurry vision and make your eyes sensitive to light. Find out about symptoms, causes and treatment for this eye condition.
Narcolepsy
Learn more about this sleep disorder that causes periods of involuntary sleep, sleep paralysis and early rapid eye movement (REM) sleep.
Sex during pregnancy: What's OK, what's not
Questions about sex during pregnancy? Here's what you need to know.
Herd immunity and COVID-19: What you need to know
To protect groups of people over time, it helps to know what level of recovery or vaccination in a population makes it hard for a germ to spread.
Groin pain (male)
Learn more about the causes and symptoms of this type of pain. Also find out how you can treat it at home and when to get a checkup.
Epididymitis
This inflammation of the coiled tube at the back of the testicle that stores and carries sperm is usually caused by a bacterial infection.
Prostate laser surgery
Prostate laser surgery — Overview covers the risks and results of this treatment to relieve symptoms caused by an enlarged prostate.
Transurethral microwave thermotherapy (TUMT)
Learn about this minimally invasive procedure for treating an enlarged prostate, including how it's done and possible risks and benefits.
Klinefelter syndrome
This genetic disorder occurs when a male is born with an extra copy of the X chromosome and may result in low testosterone production and infertility.
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