Patient: 26 years old, I had laparoscopic surgery for chocolate cyst in March, and after the surgery, my doctor ordered 6 injections of goserelin to prevent recurrence. What is the reason for the menstruation now that I have stopped having menstrual periods after having received three injections? It was accompanied by irregular hot flashes before. Answer: Pharmacological treatment after endometriosis surgery is an important part of its treatment, aiming to reduce the recurrence rate after surgery. Most patients currently stop menstruating during treatment with GnRHa-based medications. The hot flashes you describe are due to suppression of ovarian function by the medication. The disappearance of hot flashes suggests a gradual recovery of ovarian function because ovarian function is unstable during this period, which can be manifested by irregular shedding of the endometrium and a small amount of uterine bleeding, especially in young patients, but if the bleeding is prolonged, high in volume and severe abdominal pain, you should seek further medical attention.