Progesterone is very important for the development of the fetus during pregnancy and can provide support for better growth and development of the fetus in the womb. If the second time is lower than the first time, within the normal value is normal, women’s progesterone value fluctuates after pregnancy will cause low progesterone. If it drops too low, miscarriage will easily occur, which may be related to embryonic dysplasia, ovarian luteal insufficiency, etc. To determine the intrauterine pregnancy through ultrasound examination, it is recommended to follow the doctor’s advice to supplement progesterone capsules or to take dydrogesterone tablets and inject progesterone for fetal preservation treatment. Pregnancy is a special period, pregnant women need to pay attention to rest, avoid strenuous exercise and sex, it is very necessary to maintain regular rest and good eating habits, and regular pregnancy tests.