Second trimester
Learning Center
What is wheatgrass? Why is it in my drink?
Wheatgrass is a popular addition to smoothies and other drinks. While it's a rich source of nutrients, it's not a disease cure-all.
What's the difference between H1N1 flu and influenza A?
H1N1 flu is a subcategory of influenza A.
Wheezing in children: Could it be asthma?
Wheezing in children may be a sign of asthma — but not always.
When the heat is on, which oil should you use?
Olive, canola or grapeseed? Which cooking oil should you use for sauteing and frying?
When to brush your teeth
When should you brush your teeth? Learn how to protect your oral health.
White coat hypertension: When blood pressure rises in a medical setting
Blood pressure that measures high during a health checkup could be a risk factor for high blood pressure. Find out more.
White patch on skin: A cause for concern?
A small white patch on skin may have several causes, including eczema, psoriasis and vitiligo.
White stool: Should I be concerned?
White stool may mean a serious liver problem. Learn about causes.
Whole-body vibration: An effective workout?
Whole-body vibration — Don't give up regular exercise and a healthy diet.
Why isn't there a hepatitis C vaccine?
Hepatitis C vaccine development is far from straightforward, but experimental vaccines are under study.
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