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Learning Center
Video: Ovulation
Ovulation — the release of an egg from an ovary — occurs about midway through the menstrual cycle. See how it happens.
How your brain works
Which part of your brain does what? Take a tour.
HER2-positive breast cancer: What is it?
HER2-positive breast cancer tends to be more aggressive than other types of breast cancer. Treatments that target HER2 are very effective.
Kawasaki disease
Learn more about this condition that primarily affects young children and causes inflammation in the walls of the arteries throughout the body.
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.
Placenta: How it works, what's normal
Understand how this pregnancy organ works and what conditions can affect it.
Iron deficiency in children: Prevention tips for parents
Learn how much of this key mineral your child needs and what the health risks of not getting enough are.
Mayo Clinic Minute: Restless legs syndrome in kids
This sleep disorder is common in children and can lead to daytime sleepiness and attention problems.
Mayo Clinic Minute: What is hearing loss?
Learn about hearing loss types and causes.
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