Norethisterone acetate (NETA) (INN, BAN), also known as norethindrone acetate (USAN), sold under brand names including Primolut-Nor (major), Aygestin (US), Gestakadin, Milligynon, Monogest, Norlutate (US, CA), Primolut N, SH-420 (UK), Sovel, Styptin, and others, is a steroidal progestin of the 19-nortestosterone group with additional weak androgenic and estrogenic activity that is used orally as a hormonal contraceptive, in the treatment of gynecological disorders such as abnormal uterine bleeding, and as a component of hormone replacement therapy for menopause. It is the 17β-acetate ester of norethisterone, and acts as a prodrug to norethisterone in the body.