There is a significant drop in progesterone when checking pregnant women after a fetal stoppage. After pregnancy, progesterone in the body is significantly higher. Progesterone is checked in early pregnancy and usually lasts above 25ng/ml. In the first 3 months of pregnancy, the production of progesterone depends mainly on the mother’s body for secretion. If a pregnant woman has luteal insufficiency, then there is a risk of preterm miscarriage. After the third month of pregnancy, the placenta is formed and the progesterone to maintain the fetus is mainly secreted by the placenta. In early and middle pregnancy, if a pregnant woman has a preterm miscarriage, the first consideration is progesterone deficiency and progesterone is given for fetal preservation treatment. After embryonic abortion, progesterone will be significantly lower.