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Learning Center
Is a home sperm test useful?
Using a home sperm test to check your fertility may not provide a clear answer.
Is fibromyalgia hereditary?
Is fibromyalgia hereditary? The disorder appears to run in families.
Kids and exercise: How much activity do they need?
You know your kids should exercise, but how much? Find out and get ideas for helping children and adolescents be more physically active.
Loss of sex drive in men: Natural with aging?
Age-related loss of sex drive is normal, but sometimes an underlying condition is at play.
Loss of taste and smell: Natural with aging?
Aging can play a role in the loss of taste and smell — but not always.
Male masturbation: Does frequency affect male fertility?
Male masturbation has little effect on sperm count or quality.
Marijuana and depression: What's the link?
Marijuana and depression seem to go hand in hand for some people, but there's no clear evidence that marijuana directly causes depression.
Measles vaccine: Can I get the measles if I've already been vaccinated?
Is it possible to get measles from someone else if you've been vaccinated?
Migraines: Are they triggered by weather changes?
Migraines — Are they triggered by weather changes?
Mononucleosis and Epstein-Barr: What's the connection?
The Epstein-Barr virus sometimes causes a disease known as mono. Learn who is at risk and what the symptoms are.
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