Second trimester
Learning Center
Easy bruising: Why does it happen?
Get the facts about easy bruising. Learn about causes and find out when it's a sign of a problem.
Fetal development: The 2nd trimester
Fetal development progresses rapidly in the second trimester. Check out the weekly changes.
Flu symptoms: Should I see my doctor?
See a healthcare professional if you are at high risk for complications from flu.
Food allergy vs. food intolerance: What's the difference?
Might you have to swear off milkshakes for good? Follow the symptom clues to find out whether you possibly have a food allergy or a food intolerance.
Fundal height: An accurate sign of fetal growth?
Understand how fundal height is measured and what it means.
GERD: Can certain medications make it worse?
Certain medicines can make symptoms of gastroesophageal reflux disease (GERD) worse. Learn more.
Guide to different tick species and the diseases they carry
Learn about different tick species and some of the diseases they may carry.
Headache
Headache: Symptom — Overview covers definition, possible causes of this painful symptom.
Heart attack symptoms: Know what's a medical emergency
Watch for these heart attack symptoms.
Heart palpitations
Know when and how feelings of a rapid, fluttering or pounding heartbeat are treated.
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