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antiprogestin (AN-tee-proh-JES-tin)

 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.



Previous Definitions:antineoplastic antibiotic, antineoplaston, antioncogene, antioxidant, antiparasitic
Next Definitions:antiretroviral therapy, antisense c-fos, antisense DNA, antisense RNA, antithymocyte globulin

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