Fitness basics
Learning Center
Circumcision (male)
Learn about the benefits and risks of surgery to remove the skin that covers the tip of the penis.
Chorionic villus sampling
Find out about this prenatal test that can uncover chromosomal and other genetic conditions early in pregnancy.
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.
Chest X-rays
Learn what these chest images can show your doctor and what conditions they may uncover.
Cervical mucus method for natural family planning
Normal vaginal discharge can give you clues about your fertility. Learn how to track changes in cervical mucus to predict when you may be more likely to get pregnant.
CT scan
This imaging test helps detect internal injuries and disease by providing cross-sectional images of bones, blood vessels and soft tissues inside the body.
CT coronary angiogram
Learn about the risks and results of this imaging test that looks at the arteries that supply blood to your heart.
COVID-19 diagnostic testing
Find out how COVID-19 diagnostic testing is done to learn if you're currently infected with SARS-CoV-2, the virus that causes coronavirus disease 2019.
COVID-19 antibody testing
Learn how COVID-19 antibody testing is done to find out if you've had a past infection with SARS-CoV-2, the virus that causes coronavirus disease 2019.
C-section
Learn the reasons this surgical procedure to deliver a baby is done, the risks and tips for recovery.
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