Healthy diets
Learning Center
Hormone therapy for breast cancer
Find out how hormone therapy is used to treat breast cancer. Learn about risks and what to expect during this treatment for ER and PR positive breast cancers.
Hormonal IUD (Mirena)
This birth control device gives long-acting protection that can be reversed.
Home parenteral nutrition
Learn about home parenteral nutrition treatment at Mayo Clinic and the situations in which this specialized form of food infused through a vein is used.
Home enteral nutrition
Learn how Mayo Clinic specialists help you maintain your feeding tube at home.
Holter monitor
This wearable device keeps track of the heart's rhythm during daily activities. Learn when you might need one and what to expect.
Hip replacement
Hip replacement may be an option if your hip pain interferes with daily activities and nonsurgical treatments haven't helped.
Hemoglobin test
Learn why this blood test is done, how to prepare for it and what the results might mean.
Hemodialysis
Learn about hemodialysis and the risks and benefits of this procedure to treat kidney failure.
Hematocrit test
Learn about this red blood cell blood test, including why it's used and what to expect.
Heart valve surgery
Learn more about surgery to treat heart valve disease, which involves repairing or replacing affected heart valves.
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