Progesterone is slightly low at 17 in early pregnancy and needs to be treated with medication as prescribed by the doctor. Progesterone in early pregnancy is secreted by the ovarian gestational corpus luteum, and with the increase in gestational weeks and gradually increased secretion, early pregnancy when the normal value of progesterone between 20-25ng/ml. Sufficient amount of progesterone is conducive to the fertilization of the egg, but also can inhibit uterine contractions, continue to maintain the pregnancy. When the progesterone test is 17ng/ml, the value is low, which can increase the risk of miscarriage, and need to follow the doctor’s advice to give progesterone and other treatments. Early pregnancy must pay attention to appropriate rest, appropriate increase in nutrition, continue to take folic acid as prescribed by the doctor, avoid strenuous exercise and overwork. When symptoms of preeclampsia such as abdominal pain and vaginal bleeding occur, ultrasound, progesterone and blood HCG (human chorionic gonadotropin) levels should be combined to make a definitive diagnosis, and proactive treatment should be given to preserve the fetus.