The normal range of progesterone is different in different stages of pregnancy, in early pregnancy progesterone is 60-90nmol/L, in mid pregnancy progesterone is 160-310nmol/L, in late pregnancy progesterone is 310-1200nmol/L. It is better to go to a regular hospital to take blood test to see the value of progesterone, if progesterone is low, it is easy to cause miscarriage, you need to take progesterone under the guidance of the doctor. It is advisable to take progesterone or inject progesterone under the guidance of a doctor to prevent miscarriage, and it is also advisable to take vitamin E. It is best to have regular ultrasound examinations to see the development of the fetus, and pay attention not to exercise strenuously and not to have intercourse in early pregnancy, which can easily cause miscarriage. During the injection of progesterone, it is best to take regular blood tests to see the situation of progesterone, if progesterone does not come up, it is easy to miscarry.