antiprogestin

Definition / meaning of antiprogestin

A substance that prevents cells from making or using progesterone (a hormone that plays a role in the menstrual cycle and pregnancy). Antiprogestins may stop some cancer cells from growing and they are being studied in the treatment of breast cancer. An antiprogestin is a type of hormone antagonist.

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Find More About 'antiprogestin'

Source(s):

The Web site of the National Cancer Institute (http://www.cancer.gov/)

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