Tween and teen health
Learning Center
Urinalysis
This common lab test checks urine for signs of disease and for clues about overall health.
Vaccines during pregnancy: Are they safe?
Find out which vaccinations you need while pregnant and which ones to stay away from.
Vaccines for adults: Which do you need?
Vaccines offer protection from infectious diseases. Find out how to stay on top of the vaccines recommended for adults.
Vaginal agenesis
In this rare condition that occurs before birth, the vagina doesn't develop and the uterus may only develop partially or not at all. Learn about treatment.
Varicocele
Find out how this condition involving the enlargement of veins in the scrotum can affect sperm quality and production.
Vascular rings
Learn more about this condition in which malformations of the aortic arch encircle the windpipe and esophagus and can press against them.
Vasectomy
Find out more about this procedure that provides nearly 100 percent effective male birth control by cutting the supply of sperm to semen.
Vasectomy reversal
Learn about this microsurgery procedure that can restore your fertility after a vasectomy.
Ventricular fibrillation
Without fast treatment, this heart rhythm problem can cause death within minutes. Learn the symptoms of VFib and what actions to take to save a life.
Video: An asthma attack
What happens to your airways during an asthma attack?
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