Teen health
Learning Center
Conjoined twins
If an early embryo only partially separates and two babies develop, they remain physically connected — most often at the chest, abdomen or pelvis.
Contraceptive implant
Learn about the benefits, risks and effectiveness of this type of long-acting, reversible birth control.
Coping with pain after breast surgery
Pain is common after mastectomy and other breast cancer operations. Find out what causes it and learn about treatment options.
Copper IUD (ParaGard)
A copper intrauterine device offers a hormone-free option for long-acting, reversible birth control.
Coronavirus disease 2019 (COVID-19)
Coronavirus disease 2019 (COVID-19) is an illness caused by the virus SARS-CoV-2. Learn more about the symptoms, risks and ways to protect yourself.
Cradle cap
Learn about the symptoms, treatments and home care tips for this short-lived type of seborrheic dermatitis that's common in infants.
Craniosynostosis
This condition results in premature fusing of one or more of the joints between the bone plates of an infant's skull before the brain is fully formed.
Crying baby: What to do when your newborn cries
Listening to a crying baby can take a toll on your emotions. Follow these tips to cope with the tears.
Cytomegalovirus (CMV) infection
Understand the symptoms and treatment of this common viral infection that can cause health problems for babies and people who have weakened immunity.
Delaying your period with hormonal birth control
Delaying your period is possible if you use an extended or continuous method of birth control. Find out how you can have more control over your menstrual cycle.
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