Hi, Norethisterone is a synthetic form of the female hormone progesterone. It is used for a variety of purposes, including contraception, regulation of menstrual cycles, and treatment of menstrual disorders such as heavy or irregular periods, endometriosis, and premenstrual syndrome (PMS). In some cases, Norethisterone may also be prescribed to delay menstruation, for example, if a woman is planning to go on holiday or if she is participating in a sporting event. Additionally, it may be used to help manage symptoms of menopause. However, it is important to note that Norethisterone should only be taken under the guidance of a healthcare professional and should not be used as a long-term solution without proper medical supervision. Take care. Hope I have answered your question. Let me know if I can assist you further. Regards, Dr. Shah Hussain, General & Family Physician