Follicle-stimulating hormone is a female sex hormone that is discharged from the pituitary gland of the hypothalamus as a gonadotropin, often called follicle stimulating hormone, which can also be referred to as follicle stimulating hormone. This hormone is mainly emitted in the body and acts on the ovaries to encourage follicle development. Under its action, the follicles gradually grow from small follicles to developing follicles, until the middle of menstruation when they enter ovulation, so that the follicles develop into mature follicles, and finally the mature eggs can be discharged, so this hormone can regulate the normal ovulation of the ovaries normally. Once the hormone secretion is abnormal or relatively low, it can show that women have abnormal menstruation, abnormal cycle and abnormal period. Therefore, this is one of the female hormones that need to be checked in the clinical context of physical and menstrual conditions, for example, the routine sex hormone test includes this endocrine test and hormones.