FSH in the follicular phase is 3.5 to 12.5 U/L and LH is 2.4 to 12.6 U/L. FSH refers to follicle stimulating hormone and luteinizing hormone, collectively known as gonadotropins, the main role is to promote the development and maturation of follicles, but also to promote the secretion of estrogen, this hormone in different menstrual cycles in different values, in the follicular phase of the value of 3.5~12.5U / L. LH refers to luteinizing hormone, which is secreted by the adenopituitary gland cells. LH refers to luteinizing hormone, a glycoprotein gonadotropin secreted by pituitary cells, which can secrete estrogen to promote ovulation and also promote the production and maintenance of the corpus luteum, the value of this hormone varies from cycle to cycle, and the value of this hormone during the follicular phase ranges from 2.4 to 12.6 U/L. If a woman has irregular menstruation or infertility, she needs to undergo these two tests. LH/FSH was previously diagnostic of polycystic ovary syndrome, and if the result of this test is greater than 3, polycystic ovary syndrome may be present.