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The umbilical cord is the ropey structure that connects the fetus to the placenta in the mother's uterus. Blood vessels in the

Ultraviolet light comes from the sun's rays but is invisible to humans. Two of the three forms of ultraviolet light, UVA and UVB

Ultrasound is a test that uses reflected sound waves to produce an image of organs and other structures in the body. It does not

Ulcerative colitis makes swelling, inflammation, and sores in the lining of the large intestine (colon) and causes diarrhea, belly

An ulcer is a sore that develops on the skin (such as the skin around the ankles) or on a mucous membrane (such as inside the

Uveitis is an inflammation, or swelling and tenderness, of the middle layer of the eye. This area includes the colored part of the

The UV index forecasts the intensity of ultraviolet (UV) light for a given day. The index helps people know what precautions to

The uterus is a hollow, pear-shaped organ in the lower abdomen. It is where a fetus grows during pregnancy. About once a month the

Uterine prolapse is a form of pelvic organ prolapse in which the uterus moves from its normal position and presses down into the

Uterine fibroids are growths on or in your uterus. Although they are sometimes called fibroid tumors, they aren't cancer. You don