Urotrophin 75 units is usually administered for 7-10 days to mature follicles, starting from the 5th day of menstruation. The specific dosage and usage varies according to the patient’s condition, and it is recommended that the patient should be fully examined and administered under the guidance of a doctor. Urotrophin injection is often used to treat infertility caused by polycystic ovaries, which is a long-term ovarian failure due to the dysfunction of the hypothalamic-pituitary-ovarian mechanism, and such cases usually manifest clinically as anovulatory menstrual disorders. Urotropin is a special type of drug that promotes the development of follicles in the body and increases a woman’s chances of pregnancy after injection. Urotrophin 75 units are usually injected from the 5th day of menstruation and the follicles will mature and expel in 7-10 days. It is important to note that urotropin must be injected within 4 hours after dilution with saline, after 4 hours the drug will not have the appropriate effect. Patients are advised to maintain a relaxed mental state during treatment, as severe nervous tension can affect or even inhibit ovulation, maintain a light diet, and insist on proper exercise.