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How you hear
Your ears enable you to gather and interpret sounds from the world around you.
Ovulation signs: When is conception most likely?
Trying to get pregnant? Learn about ovulation signs and symptoms.
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.
Types of dermatitis
Learn to identify types of dermatitis by how the skin looks. Examples include atopic dermatitis, contact dermatitis and seborrheic dermatitis.
Premenstrual dysphoric disorder: Different from PMS?
Extreme moodiness, intense sadness or marked irritability in the days before your period — along with your usual PMS symptoms — could be PMDD.
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.
How your brain works
Which part of your brain does what? Take a tour.
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