Nutritional supplements
Learning Center
Vasectomy
Find out more about this procedure that provides nearly 100 percent effective male birth control by cutting the supply of sperm to semen.
Vascular rings
Learn more about this condition in which malformations of the aortic arch encircle the windpipe and esophagus and can press against them.
Varicocele
Find out how this condition involving the enlargement of veins in the scrotum can affect sperm quality and production.
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.
Uterine polyps
Tissue growths inside the uterus can cause abnormal uterine bleeding or infertility. Learn about tests and treatment.
Urinalysis
This common lab test checks urine for signs of disease and for clues about overall health.
Ureteral obstruction
Learn about what causes blockage of the tubes that carry urine from the kidneys to the bladder, tests you might need and how the condition can be treated.
Unusual COVID-19 symptoms: What are they?
COVID-19 can cause a wide variety of symptoms, some more common than others. Learn about how COVID-19 can make you feel.
Undigested food in stool: What does it mean?
Undigested food in stool generally isn't a problem unless it's accompanied by other symptoms.
Undescended testicle
Learn about causes, complications and treatment of this condition in which one or both testicles aren't in the usual place within the scrotum.
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