Hi, Nordet is Levonorgesterol which is progestin hormone and ethinylestradiol, an estrogen compound. It is called as Combine pill that it has both oestrogen and Progestin, two major hormones of the menstrual cycle. Norethistrone is Progestin which is also called as mini pill because it has only progestin without oestrogen. Both the drugs acts by making the vaginal fluid thicker than usual, change the lining of the uterine endometrium and prevent the ovulation that is the release of egg. In Norethistrone, ovulation inhibition may be inhibited. Mini pills are prescribed for women having non compliance with oestrogen. Thick endometrium is one of the major causes for menstruation is endometrial bleeding. These pills act by reducing the uterine lining. So that there is bleeding on stopping the drugs. Hysterectomy is the best option for the women those who have children and who had done permanent sterilisation. Hormone replacement therapy may be advised in post hysterectomy patients. Take care. Hope I have answered your question. Let me know if I can assist you further. Regards, Dr. Pradeepraj, General & Family Physician