Pregnancy symptoms
Learning Center
Cornea transplant
This procedure uses donor tissue to restore vision and reduce pain from cornea disease. Our overview helps you understand the risks and benefits of this sight-saving operation.
Cordocentesis
Find out how this prenatal test uses umbilical cord blood to check for genetic disorders and infections.
Copper IUD (ParaGard)
A copper intrauterine device offers a hormone-free option for long-acting, reversible birth control.
Contraceptive sponge
Learn about this birth control option that prevents pregnancy by blocking sperm from entering the uterus.
Contraceptive implant
Learn about the benefits, risks and effectiveness of this type of long-acting, reversible birth control.
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.
Circumcision (male)
Learn about the benefits and risks of surgery to remove the skin that covers the tip of the penis.
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