Weight-loss basics
Learning Center
Metabolism and weight loss: How you burn calories
Learn if your metabolism influences weight loss — or weight gain.
Counting calories: Get back to weight-loss basics
Calories count — Try these calorie-cutting basics to get a handle on your weight.
Getting past a weight-loss plateau
Hit a weight-loss plateau? Don't despair. Restart your weight loss with these tips.
Priapism
Understand the symptoms, possible causes and treatment of prolonged erection of the penis, including when to seek emergency care.
Male hypogonadism
This condition affects the ability of men's bodies to produce enough testosterone or enough sperm or both.
Retrograde ejaculation
Learn about the symptoms and treatment options for this condition that can cause male infertility.
Erectile dysfunction: Nonoral treatments
Get the facts about shots, penis pumps and other ED treatments that don't involve taking medicine by mouth.
Mumps
Find out more about the symptoms and treatment of this viral illness and how vaccines can prevent it.
Rett syndrome
This rare genetic disorder affects the way the brain develops, causing a progressive inability to use muscles for eye and body movements and language.
Spermatocele
Learn more about this noncancerous testicular disorder that may require surgery if it's causing discomfort. But, the condition often needs no treatment.
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