First trimester
Learning Center
1st trimester pregnancy: What to expect
The first few months of being pregnant can bring physical and emotional changes, such as breast tenderness, nausea, anxiety and excitement.
Age spots (liver spots)
Learn more about the harmless dark spots on your skin that tend to appear as you age, especially in areas exposed to the sun. Treatment is available.
Birth control pills: Harmful in early pregnancy?
If you took birth control pills before you knew you were pregnant, the risks of birth defects are low.
Facial fillers for wrinkles
Find out more about facial injections, also called soft tissue fillers, that can temporarily smooth wrinkles.
Fetal development: The 1st trimester
Fetal development begins before you even know you're pregnant. Here's what happens early on.
Gastrointestinal stromal tumor (GIST)
Learn about this type of cancer that usually happens in the stomach or small intestine. Treatments often include surgery and targeted therapy.
Hip replacement
Hip replacement may be an option if your hip pain interferes with daily activities and nonsurgical treatments haven't helped.
Implantation bleeding: Common in early pregnancy?
Implantation bleeding is a common early pregnancy symptom. Understand why it happens.
Lung volume reduction surgery
Lung volume reduction surgery helps some people with severe emphysema breathe easier. Diseased lung tissue is removed so the remaining tissue works better.
Mammary duct ectasia
Mammary duct ectasia is a noncancerous breast condition that affects the milk ducts. Learn the signs and symptoms and when treatment might be needed.
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