Second trimester
Learning Center
2nd trimester pregnancy: What to expect
Second trimester pregnancy often brings welcome relief from nausea, breast tenderness and other pregnancy symptoms.
Abdominal pain
Everyone experiences abdominal pain from time to time. Find out when it might be cause for concern.
Alzheimer's stages: How the disease progresses
Alzheimer's stages — common behaviors as the disease progresses.
Ambiguous genitalia
Learn about causes and treatment of ambiguous genitalia, a rare disorder of sex development in which a baby's external genitals are not clearly male or female.
Amenorrhea
Absence of menstruation (amenorrhea) may be linked to an underlying, treatable problem. Learn about amenorrhea causes and when to seek help.
Anal pain
Anal pain: Symptom — Overview covers definition, possible causes of this common symptom.
Arcus senilis: A sign of high cholesterol?
With this condition, older adults develop a gray arc around the cornea of the eyes.
Aspirin allergy: What are the symptoms?
An aspirin allergy or sensitivity can cause serious symptoms.
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.
Baby poop: What to expect
Infant stool can have various colors and textures. Know what to expect in your newborn's diapers.
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