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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.
Men: Consider this when life throws you a curveball
Studies show that men display more evidence of the "fight or flight" response to stress. Recognizing your coping strategies is the first step to increasing resilience and improving your ability to withstand life's challenges.
Mild cognitive impairment (MCI)
Learn more about this stage between the typical cognitive decline of aging and the more serious decline of dementia.
Mold on your cheddar? Don't despair
If you spot mold on a wedge of hard cheese, such as cheddar or Parmesan, you may be able to salvage the cheese. Cut away the moldy part and at least 1 inch (2.5 centimeter) of the surrounding cheese, keeping the knife out of the mold. Moldy shredded or crumbled cheese can't be saved, however, and should be discarded.
Moldy cheese: Is it OK to eat?
Moldy cheese may be unappetizing, but is it unsafe?
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