Grief
Learning Center
Healthy sperm: Improving your fertility
You can take simple steps to have healthy sperm and improve your fertility.
Heart cancer: Is there such a thing?
Although heart tumors do occur, the vast majority of them are noncancerous (benign).
Heart rate: What's normal?
A normal resting heart rate for adults ranges from 60 to 100 beats per minute. A heart rate above or below that may signal a problem.
Henoch-Schonlein purpura
Learn about the symptoms, causes and treatment of this blood vessel disease, also called IgA vasculitis, that causes a purplish rash on the lower legs.
Home birth: Know the pros and cons
Understand the possible risks and how to plan and prepare for a home birth.
Hormone therapy for prostate cancer
Find out what to expect during testosterone-blocking therapy. Learn about choices, including medicines and surgery.
How you hear
Your ears enable you to gather and interpret sounds from the world around you.
How your brain works
Which part of your brain does what? Take a tour.
Hydrocele
Find out more about the symptoms, causes and treatments for this swelling in the scrotum.
Hyperinsulinemia: Is it diabetes?
Hyperinsulinemia often is associated with type 2 diabetes.
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