GNRH is gonadotropin-releasing hormone, if during the use of injections, inhibit ovarian function, thus inhibiting the role of endometrial growth, usually will not come to menstruation, but is not permanent amenorrhea, after stopping the drug slowly menstruation will be restored. GNRH injections are designed to inhibit ovarian function to achieve an artificial pseudo-menopausal state, and are generally used in patients with endometriosis or postoperative uterine fibroids. The use of GNRH will cause the hormone levels secreted by the ovaries to be in an extremely low state, which generally does not reach the level at which the endometrium can grow, so the growth of the endometrium is inhibited, and consequently, menstruation will not occur. Meanwhile, for postoperative patients with ovarian chocolate cysts, adenomyosis, etc., if there are residual foci, after GNRH treatment, the residual tiny foci can also be gradually shrunken or necrotic, which can enhance the efficacy of postoperative treatment. However, the use of medication needs to be based on the doctor’s prescription, do not arbitrarily use the drug on your own.