NCI Dictionary of Cancer Terms

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The NCI Dictionary of Cancer Terms features 7,812 terms related to cancer and medicine.

Browse the dictionary by selecting a letter of the alphabet or by entering a cancer-related word or phrase in the search box.

in vitro fertilization
(in VEE-troh FER-tih-lih-ZAY-shun)
A procedure in which eggs are removed from a woman’s ovary and combined with sperm outside the body to form embryos. The embryos are grown in the laboratory for several days and then either placed in a woman’s uterus or cryopreserved (frozen) for future use.