Fitness basics
Learning Center
Combination birth control pills
This oral contraceptive contains both estrogen and progestin to keep you from ovulating. These medicines prevent pregnancy and can have other benefits.
Colposcopy
Find out why colposcopy is done and what to expect during an exam to diagnose cancer and other problems affecting the cervix, vagina and vulva.
Colectomy
If you're having colon surgery, learn what to expect, the risks and how to prepare.
Cochlear implants
This electronic device improves hearing in people who have severe hearing loss from inner ear damage.
Cholesterol test
Measuring the amount of cholesterol and triglycerides in your blood can help predict your risk of blocked arteries in your heart and brain.
Chemotherapy for breast cancer
Learn how doctors use this drug treatment to kill rapidly growing breast cancer cells. Find out about chemotherapy side effects and what you can expect.
Cataract surgery
Cataract surgery — Overview covers risks, complications, results of this eye surgery.
Carotid ultrasound
This test examines the blood flow through the arteries in the neck that deliver blood from the heart to the brain.
Carotid endarterectomy
This procedure removes plaque buildup in the carotid artery to help reduce your risk of stroke.
Cardioversion
Learn what to expect during this treatment to reset the heart rhythm.
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