Progesterone has no effect on the fetus. The medication for fetal preservation needs to be used under the guidance of a doctor and in strict accordance with the instructions, do not overdose, moderate use of the medication will not affect the fetus. Progesterone is a progesterone that can provide protection for the early growth and development of the fetus during pregnancy and play a relaxing role on the uterus. In case of preterm miscarriage or low progesterone level, progesterone supplementation is required under the guidance of a doctor in a timely manner, with injections intramuscular and capsules taken orally or vaginally. Normal early pregnancy serum progesterone is secreted in a pulsatile manner with great individual variation in concentration and does not affect the pregnancy rate; only a certain local concentration of progesterone in the uterus is required. Recent expert consensus on luteinizing support and progesterone supplementation also believes that frequent blood sampling of progesterone in early pregnancy is unnecessary to pay attention to serum progesterone values. Usually, as long as there is no vaginal bleeding and other discomfort, pay attention to a reasonable diet, eat more fresh vegetables, fruits and vegetables, and rest appropriately to help fetal growth and development.