Normally, simple ovarian cyst surgery does not affect menstruation because normally it does not affect the function of the ovaries. However, in some cases, the ovarian cyst surgery is relatively large and prolonged, the ovarian cysts are serious or there are adhesions, and the process of removing the ovarian cysts may damage the normal ovarian cells, which may cause changes in menstruation because it affects the endocrine function, which affects the ovarian function and leads to endocrine disorders, affecting the growth and shedding cycle of the endometrium, which may affect menstruation. If you have not had your period for more than a month and a half, you need to go to the hospital for a review to see the hormone six and ultrasound to clarify the cause and then treat the problem.