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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.
Livedo reticularis: When is it a concern?
Learn when this condition that causes a lacy pattern on the skin is simply a result of being chilled or something more serious.
Liver cysts: A cause of stomach pain?
Occasionally, liver cysts can cause pain and discomfort in the upper abdomen.
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.
Male masturbation: Does frequency affect male fertility?
Male masturbation has little effect on sperm count or quality.
Migraines and gastrointestinal problems: Is there a link?
Migraines can be associated with certain gastrointestinal problems. Learn more.
Ministroke vs. regular stroke: What's the difference?
The term "ministroke" typically refers to a transient ischemic attack.
Mucus in stool: A concern?
Visible mucus in stool can have a variety of causes, but they're not always serious.
Multiple sclerosis: Can it cause seizures?
Seizures occur more often in people with multiple sclerosis than in the general population.
Nausea during pregnancy: A good thing?
Morning sickness is common during pregnancy. Understand what nausea and vomiting might mean while you're pregnant.
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