Eye care
Learning Center
Placenta: How it works, what's normal
Understand how this pregnancy organ works and what conditions can affect it.
Myelin oligodendrocyte glycoprotein antibody-associated disease (MOGAD)
Learn about the symptoms, diagnosis and treatments for this autoimmune disease that attacks nerve fibers in the body.
Bacterial vs. viral infections: How do they differ?
Understand the differences between bacterial and viral infections.
Yeast infection in men: How can I tell if I have one?
Yeast infections can occur in men, causing inflammation of the penis (balanitis). Learn what signs and symptoms could mean you have a yeast infection.
Bladder infection in men
Although women are more likely to get bladder infections, men can get them, too. Learn about signs and symptoms and what could put you at risk.
Allergies and asthma: They often occur together
Allergies and asthma? Find out how to control both conditions.
Video: Ovulation
Ovulation — the release of an egg from an ovary — occurs about midway through the menstrual cycle. See how it happens.
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