The normal value of progesterone on the 36th day of pregnancy should not be less than 20ng/ml, because progesterone has the function of preventing uterine contraction, keeping the uterus in a state of stasis before delivery, and promoting the development of the embryo and fetus in the womb. Once the value is less than 20ng/ml, it is considered low progesterone, which is prone to preterm miscarriage, and in serious cases, it can also lead to fetal arrest, which requires timely fetal preservation. Pregnant women with low progesterone should eat more fruits rich in pectin and dietary fiber, such as kiwi, strawberries, duck pears and other fruits, to help women supplement the body’s vitamin C and vitamin E, in order to promote the regulation of progesterone balance of the role of the soybean and other foods to supplement progesterone. For low progesterone should also be timely to the hospital for formal treatment, under the guidance of the doctor to take progesterone drugs or injections of progesterone, to improve the symptoms of low progesterone. In addition, attention should be paid to rest, strengthen nutrition, regular obstetric examination.