Progesterone is a progesterone secreted by the ovarian corpus luteum. The root cause of low progesterone level is ovarian corpus luteum insufficiency. The causes of ovarian luteal insufficiency may be due to bad habits or organic diseases, resulting in abnormal endocrine function of the ovaries: 1. Women who often smoke, due to the harmful chemicals of nicotine and tar in tobacco, accelerate the aging rate of the ovaries, resulting in insufficient levels of ovarian secretion of progesterone. 2. Often stay up late, if the patient stays up late for a long time and Inadequate sleep will accelerate the aging process of the body, which will lead to poor ovarian function. 3, nutrient deficiencies, women who are overly partial, picky or dieting for a long time will also have symptoms of poor ovarian endocrine function. 4, severe anemia, hypothyroidism and other diseases will have varying degrees of impact on the function of the ovaries, leading to insufficient progesterone levels.