Progesterone capsules to keep the fetus eat until about 12 weeks of pregnancy, if after 12 weeks still have miscarriage symptoms, you can continue to take until the symptoms disappear. The progesterone needed for embryonic development in early pregnancy is secreted by the ovarian luteal cells in the mother’s body, and if the level of secreted progesterone is insufficient, symptoms of miscarriage with aura such as vaginal bleeding, lumbar acidity, abdominal pain, and even slow development of the embryo, cessation of embryonic development, miscarriage and so on can occur. Therefore, progesterone medication is needed for fertility preservation treatment. When progesterone is low in early pregnancy, exogenous progesterone can be used for supplementation. With the further development of the fetus, the placenta gradually forms and functions well around the 12th week of pregnancy, and the placenta itself can synthesize progesterone to provide what the fetus needs for development. Therefore, progesterone can be stopped around 12 weeks of pregnancy. Some pregnant women who still have symptoms of miscarriage around 12 weeks of pregnancy can continue to use it until the symptoms of miscarriage disappear for a period of time before stopping. The use of progesterone and stopping the drug need to be carried out under the guidance of a doctor should not be taken by themselves to stop the drug.