Birth control pills
Learning Center
Bleeding during pregnancy
Learn what may cause vaginal bleeding during pregnancy and when you should see a doctor about it.
Bleeding after menopause: A concern?
It's unusual to bleed from the vagina after menopause. Learn what health problems can cause it and why you need to see your health care provider.
Birth control pill FAQ: Benefits, risks and choices
The birth control pill is surrounded by misinformation. Get the facts on common concerns and questions about taking the pill.
Bent penis
Learn what can cause a curved erection and when you may need to see a health care provider.
Baby fat: When is it cause for concern?
Find out when your baby's weight might be of concern and how to promote a healthy weight.
Aspirin allergy: What are the symptoms?
An aspirin allergy or sensitivity can cause serious symptoms.
Arcus senilis: A sign of high cholesterol?
With this condition, older adults develop a gray arc around the cornea of the eyes.
Anal pain
Anal pain: Symptom — Overview covers definition, possible causes of this common symptom.
Amenorrhea
Absence of menstruation (amenorrhea) may be linked to an underlying, treatable problem. Learn about amenorrhea causes and when to seek help.
Alzheimer's stages: How the disease progresses
Alzheimer's stages — common behaviors as the disease progresses.
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