The normal value of progesterone in the blood, because in different physiological periods, the value of progesterone varies greatly, and the concentration of progesterone in the blood is unstable. In the follicular phase, the value of progesterone is relatively low, ranging from 0.6 to 1.9 nmol/L. In the luteal phase, that is, after ovulation, the value of progesterone rises to 20.7-102.4 nmol/L. In early pregnancy, the value of progesterone ranges from 52.7 to 100.1 nmol/L. nmol/L is normal. After the formation of placenta, progesterone will be secreted in large amount and the value of progesterone also increases, and the value of progesterone is 98.3-185.7 nmol/L in 13-16 weeks of pregnancy, and after menopause, the value of progesterone decreases significantly and is below 3.2 nmol/L.