pregnanediol
hormone metabolite
Quick Summary
Pregnanediol is a metabolite of progesterone, a hormone primarily involved in regulating the uterine lining for pregnancy. It is formed mainly in the liver and is partially excreted in urine, where its measurement can indicate ovarian function. Progesterone itself is produced by the ovaries, placenta, and adrenal glands and is crucial for preparing the uterus for egg implantation and maintaining pregnancy. If fertilization does not occur, progesterone levels drop, leading to menstruation.12
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