Healthy pregnancy
Learning Center
COVID-19: Long-term effects
Learn about the possible long-term effects of COVID-19.
Test anxiety: Can it be treated?
Feelings of worry and self-doubt can interfere with how well you do on tests. Here's what you can do to lower your anxiety.
Bone marrow transplant
Learn about this procedure that replaces unhealthy bone marrow with stem cells. Your own cells, donor cells or cells from umbilical cord blood may be used.
Tricuspid valve regurgitation
A leaky tricuspid valve may make you feel tired and have difficulty exercising. Learn how this type of heart valve disease is diagnosed and treated.
Sex during pregnancy: What's OK, what's not
Questions about sex during pregnancy? Here's what you need to know.
Phenylketonuria (PKU)
PKU is caused by a change in the gene that helps create an enzyme needed to break down phenylalanine. Treatment includes a special diet and medication.
Reye's syndrome
Learn more about the causes and treatment of Reye's syndrome, a rare but serious condition causing swelling in the liver and brain.
Shellfish allergy
It's possible to be allergic to some types of shellfish without reacting to other types. Learn more about this common food allergy.
Sarcoma
Learn about this cancer that forms in the bones and the connective tissue. Find out about symptoms, diagnosis, treatment and the many types of sarcoma.
Esthesioneuroblastoma
This cancer begins in the upper part of the inside of the nose. Treatment usually involves surgery. Other options include radiation therapy and chemotherapy.
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