Early pregnancy triple test refers to the detection of human chorionic gonadotropin, progesterone and estradiol, the values of these three hormones vary with the time of pregnancy. Human chorionic gonadotropin can be detected by blood one week after embryo implantation, and pregnancy can be confirmed if the value is greater than 10 IU/L. The value is in the range of 100-500 IU/L around four weeks of menopause, and the secretion reaches its peak in the range of 15,000-200,000 IU/L at 8-10 weeks of menopause. Progesterone is a progesterone hormone secreted by the ovaries, with a value of 20ng/ml at 4-6 weeks of menopause and an average value of 28.6ng/ml at 8-10 weeks of menopause, while the value of estradiol in early pregnancy is normally 0-300ng/L. The above three hormones are very crucial for the normal development of the embryo, and a low value of any of them may cause miscarriage.