Fitness basics
Learning Center
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.
Congenital diaphragmatic hernia (CDH)
In CDH, a baby's diaphragm — the muscle that separates the chest from the abdomen — develops a hole called a hernia. Learn about treatment before birth.
Transposition of the great arteries
This serious, rare heart problem present at birth requires surgery to correct. Learn about its symptoms and treatment.
Dry skin
Learn more about the causes of and self-care tips for a common flaky skin condition that tends to be temporary or seasonal but may become a lifelong problem.
Metachromatic leukodystrophy
This rare genetic disorder causes fatty substances (sulfatides) to build up in your brain and nervous system, causing progressive loss of nerve function.
Vaginal agenesis
In this rare condition that occurs before birth, the vagina doesn't develop and the uterus may only develop partially or not at all. Learn about treatment.
Fetal alcohol syndrome
This condition results from alcohol exposure before birth. The exposure causes lifelong problems with behavior, learning, thinking and physical development.
Hepatitis B
This highly contagious virus can cause long-lasting problems if it goes untreated. Learn about the symptoms, treatment and prevention of this serious liver infection.
Truncus arteriosus
Learn more about this congenital heart defect that makes it difficult for the heart to pump the right amount of blood to the lungs and the body.
Bladder exstrophy
This rare birth defect occurs when the bladder develops outside the fetus during pregnancy. The condition can be repaired with surgery.
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