Elementary students
Learning Center
Video: What happens during obstructive sleep apnea?
Sleep apnea — Watch this video to see how snoring and obstructive sleep apnea occur.
Vitamin B-12 and depression: Are they related?
Low levels of vitamin B-12 and other B vitamins may be linked to depression, but more research is needed.
Vitamin D deficiency
What are the risks of too little vitamin D?
Vitamin D deficiency: Can it cause high blood pressure?
Too little vitamin D is bad for the bones, but what about the heart? Learn how a low vitamin D level may affect blood pressure.
Vitamin D toxicity: What if you get too much?
Understand the risks of too much vitamin D, including a toxic reaction.
Vulvar cancer
Learn about this rare cancer that forms on the skin that surrounds the urethra and vagina. Treatments include surgery, radiation and chemotherapy.
Vulvodynia
Learn about pain, burning and irritation of the vaginal area that doesn’t have a clear cause. Then find out how to get relief.
Water breaking: Understand this sign of labor
Learn how to tell this sign of labor and what do next.
Water retention: Relieve this premenstrual symptom
Find out what's behind premenstrual water retention and what treatments might lessen discomfort.
White stool: Should I be concerned?
White stool may mean a serious liver problem. Learn about causes.
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