It is normal for progesterone values to be between 4.73 and 50.74ng/ml in a month or so of pregnancy. After pregnancy progesterone level will rise steadily with the increase of gestational weeks, when pregnant with a month or so pregnant women’s body progesterone is mainly secreted by the ovarian corpus luteum, the normal value is between 4.73 to 50.74ng/ml. Adequate progesterone in early pregnancy can prevent uterine contractions and facilitate the fertilization of the egg. When the corpus luteum is not fully functional, the risk of early miscarriage can be increased due to low progesterone. Early pregnancy should pay attention to not strenuous exercise and exertion, prohibit coitus, when abdominal pain, vaginal bleeding and other symptoms need to go to the hospital in a timely manner, to ultrasound to clarify intrauterine pregnancy, but also combined with blood HCG (human chorionic gonadotropin) and progesterone test to clarify the diagnosis, and the need to comply with the doctor’s instructions to rest properly, give progesterone and other medications to protect the fetus treatment.