Urinary gonadotropins usually need to be given for about 7 to 12 days, and the exact number of days needs to be decided based on the results of ultrasound monitoring and urine estrogen monitoring. Urotropin is a postmenopausal gonadotropin that promotes follicular maturation and ovulation. If urotensin is used to promote ovulation, it usually takes 7 days, but if it is used to promote follicular maturation and ovulation at the same time, the number of days of injections will be relatively higher, about 12 days. If the urinary estrogen exceeds 200μg in 24h, the injection should be stopped to avoid overstimulation. The drug is contraindicated in patients with unexplained abnormal vaginal bleeding, uterine fibroids, ovarian cysts, enlarged ovaries, adrenal insufficiency, thyroid insufficiency and primary ovarian failure. Uroseptin should not be injected without authorization, and should be used with the help of a doctor to avoid adverse reactions such as rupture of ovarian cysts and enlargement of ovaries caused by over-injection.