What is the purpose of checking progesterone levels? Besh International Medical Expert: The main role of progesterone in adult women who are not pregnant is to cooperate with estrogen and participate in the functional activity of maintaining the normal menstrual cycle. Progesterone is mainly produced by the placenta during pregnancy and its level increases with the week of pregnancy. Progesterone, based on the action of estrogen, keeps the fertilized egg in the uterus and maintains a smooth pregnancy, listen to the specific introduction below. What are the functions of checking the progesterone value? 1. It can determine twins and whether there are signs of miscarriage. 2, the normal progesterone value for women during the follicular phase is: 0.5-2.2NMOL/L, luteal phase is: 6.4-79.5NMOL/L. Progesterone increases significantly between 9 and 32 weeks of gestation up to 10-100 times the normal, and the level of pregnant twins is higher than that of pregnant singletons. If progesterone decreases, it can be diagnosed as pre-miscarriage overflow amenorrhea syndrome, the patient should go to the hospital for specialist examination in time and take active measures to preserve the pregnancy. 3, in the period of pregnancy, progesterone is a hormone that supports the growth and development of the fetus, it is secreted by the pregnancy corpus luteum of the ovaries, at this moment progesterone is significantly higher than the non-pregnancy period, and with the continuation of pregnancy blood progesterone level will be higher and higher. Therefore, in the first trimester, the progesterone value is dynamically changing. 4. Checking progesterone can determine whether it is necessary to keep the fetus or other treatment. During pregnancy, physicians usually check the progesterone value, cooperate with HCG, ultrasound and other tests, as well as whether the pregnant mother has abdominal pain, bleeding and other symptoms, to determine whether it is necessary to preserve the fetus or surgical treatment.