PROGESTERONE vs. PROGESTIN:
The hormone you take may affect your risk of breast cancer
Progesterone is a naturally occurring hormone in women. Progesterone is added to estrogen therapy to reduce the risk of endometrial cancer. Initially, progesterone was not available in a form that could be well absorbed, so pharmaceutical manufacturers created a synthetic progestin (progesterone derivative), medroxyprogesterone acetate.
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