Norethisterone is a female hormone tablet used to control, regulate or delay a woman’s menstrual cycle and may also be referred to as a period delay pill. It can also be used to treat premenstrual tension (PMT), as well as more serious conditions like endometriosis and breast cancer, making it a highly effective, multi-use drug. Primolut N is indicated for both prophylaxis and treatment of abortion because it compensates for the hormone deficit, induces quiescence of the uterus and stimulates growth of an underdeveloped uterus.