Preschoolers
Learning Center
Bacterial vaginosis
Learn about symptoms, treatments and prevention of this common vaginal condition.
Back pain during pregnancy: 7 tips for relief
Ease a painful or achy back while pregnant with these simple tips.
Baby teeth: When do children start losing them?
Losing baby teeth is a big childhood event. Find out what to expect.
BRCA gene test for breast and ovarian cancer risk
Find out what to expect if you're considering a blood test to determine if you have an increased risk of breast cancer. Learn what your results might mean.
Autism spectrum disorder and digestive symptoms
Children with autism spectrum disorder often have other health issues, including problems related to digestion.
Atypical hyperplasia of the breast
Learn how a diagnosis of atypical lobular hyperplasia or atypical ductal hyperplasia affects your risk of breast cancer and what you can do.
Atrioventricular canal defect
This congenital heart defect involves a hole in the heart. It affects blood flow through the heart valves. Learn the symptoms and how it's treated.
Atrial tachycardia
This type of fast heartbeat may occur after heart surgery or during pregnancy. But infections may trigger it, too. Learn how it's diagnosed and treated.
Atrial septal defect (ASD)
This heart problem that is present at birth causes a hole between the heart's upper chambers. It can be treated.
Ataxia
Often caused by an underlying condition, this loss of muscle control and coordination can impact movement, speech and swallowing.
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