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Learning Center
Male masturbation: Does frequency affect male fertility?
Male masturbation has little effect on sperm count or quality.
Male menopause: Myth or reality?
Male menopause is a catchy phrase, but it isn't accurate. Here's why.
Mammary duct ectasia
Mammary duct ectasia is a noncancerous breast condition that affects the milk ducts. Learn the signs and symptoms and when treatment might be needed.
Mammogram
Learn what to expect during a breast X-ray exam. Find out about the benefits of mammograms for breast cancer screening, as well as potential risks.
Mayo Clinic Minute: Steam treatment for enlarged prostate
Find out how steam treatment for enlarged prostate works.
Meatless meals: The benefits of eating less meat
Meatless meals are an easy way to eat healthfully and save money.
Mild cognitive impairment (MCI)
Learn more about this stage between the typical cognitive decline of aging and the more serious decline of dementia.
Mindfulness exercises
Engaging with the world around you can lower your stress. Here's how to practice mindfulness meditation.
Moldy cheese: Is it OK to eat?
Moldy cheese may be unappetizing, but is it unsafe?
Natural remedies for depression: Are they effective?
For some people, certain herbal and dietary supplements seem to help with depression, but more studies are needed on their effectiveness and side effects.
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