Fitness basics
Learning Center
Hypothyroidism and infertility: Any connection?
For women, there's sometimes a link between having an underactive thyroid gland (hypothyroidism) and infertility.
Hypothyroidism: Can it cause peripheral neuropathy?
Hypothyroidism can cause damage to peripheral nerves and can lead to conditions such as carpal tunnel syndrome.
Is a home sperm test useful?
Using a home sperm test to check your fertility may not provide a clear answer.
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.
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.
Narrow stools: Should I be concerned?
Narrow stools may be a sign that the colon is narrowing or has a blockage.
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