Luteinizing hormone, also known as luteinizing hormone, is a hormone secreted by the anterior pituitary gland. Its main function is to stimulate the ovaries to secrete estrogen, which causes the follicles to mature and rupture to form the corpus luteum, which in turn promotes the corpus luteum to secrete progesterone. The value of luteinizing hormone varies in normal women at different periods: 1. follicular phase, 2.12-10.89mU/ml. 2. ovulation phase, 19.18-103.03mU/ml. 3. luteal phase, 1.20-12.86mU/ml. 4. menopause, 10.87-58.64mU/ml. This numerical item is often checked in the clinical Included within the six hormone tests, the values checked should refer to the exact reference range, for example, the test done on the third day of menstruation can look at the follicular phase; if the age is 50 years or older, the menopausal phase can be referred to.