You can have intercourse during the urotropin injection. Urotropin, which is mainly used to promote the growth and development of follicles in clinical practice, is injected intramuscularly on the 5th day of menstruation, and intercourse is allowed during this period. It is recommended to monitor the growth and development of the follicles through ultrasound during the medication period. When the follicles reach about 18mm in diameter, they become the dominant follicles and can be injected intramuscularly with chorionic gonadotropin to promote the rupture of the follicles and the discharge of the eggs, and to guide intercourse, which will increase the chance of pregnancy. During the medication period, pay attention to your urine volume and observe whether you have pain and bloating in the lower abdomen. If this happens, go to the hospital for a timely check-up. During ovulation promotion, it may cause over-stimulation of the ovaries.