Progesterone, also known as progesterone, is a hormone produced by the ovaries, placenta and adrenal cortex in the body, and its normal range is less than 3.18 nmol/L during the follicular phase of a woman’s life. In clinical practice, if the progesterone in the body is greater than 15.60 nmol/L, this is indicative of ovulation in women. The value of progesterone can also tell the condition of luteal function in a woman’s body. During the luteal phase, if the value of progesterone is lower than normal, it is considered luteal insufficiency. If the progesterone level in the blood is still higher than normal after 4-5 days of menstruation, it indicates luteal atrophy.