Progesteron er et hormon som spiller en nøkkelrolle i det kvinnelige reproduktive systemet, primært produsert i eggstokkene etter eggløsning. Det forbereder livmoren på graviditet og bidrar til å opprettholde den hvis befruktning skjer, mens et fall i progesteronnivå utløser menstruasjon. Utover reproduksjon påvirker progesteron seksuell lyst, humør og beinhelse. Under graviditet produserer morkaken progesteron for å støtte fosterets utvikling og forberede til amming. Hos menn er progesteron til stede i lavere nivåer og bidrar til sædproduksjon.

Testing progesterone levels can be particularly beneficial for women experiencing infertility or recurrent miscarriages, as it’s crucial for maintaining early pregnancy. It’s also helpful for diagnosing conditions like polycystic ovary syndrome (PCOS) or luteal phase defects in women with irregular menstrual cycles. Those undergoing hormone replacement therapy, including menopausal women and transgender individuals, may need their progesterone levels monitored to adjust treatment. Additionally, testing can aid in identifying the causes of severe premenstrual syndrome (PMS) or menstrual irregularities. In pregnant women, progesterone levels can sometimes indicate the health of the placenta.
Natural progesterone, identical to the hormone produced by the human body, is often used in hormone replacement therapy and for menstrual and fertility issues, with fewer side effects compared to synthetic versions. Synthetic progestins, man-made to mimic natural progesterone but with different chemical structures, are commonly found in hormonal contraceptives and some HRT types.
