First trimester
Learning Center
Food allergy
For people with food allergies, symptoms can range from annoying to life-threatening. Learn about diagnosis and treatment of this common immune reaction.
Aortic valve disease
Learn more about diseases that affect the valve between the heart's main pumping chamber and the body's main artery.
Food poisoning
Learn more about foodborne illnesses that can cause upset stomach, vomiting and diarrhea within hours of eating contaminated food.
Infant growth: What's normal?
Infant growth rates depend on various factors. Consider what's typical during baby's first year.
Ebstein anomaly
In this rare heart defect, the tricuspid heart valve didn't form properly. This can affect the heart's ability to pump blood. Know the risks and symptoms.
Traveler's diarrhea
Learn how to avoid contaminated food and water that may lead to this common travel hazard. Plus, find out what to do if it strikes.
External beam radiation for prostate cancer
Learn about the risks and results of this procedure, which is used to deliver radiation therapy for prostate cancer.
Pulmonary atresia with intact ventricular septum
Also called PA/IVS, this rare congenital heart defect is diagnosed at or shortly after birth. Learn the symptoms and how it's treated.
Senior sex: Tips for older men
Sex isn't just for the young. Get tips for staying active, creative and satisfied as you age.
Arteriovenous malformation
In this condition, a tangle of blood vessels affects the flow of blood and oxygen. Treatment can help.
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