Clogestone acetate () (developmental code name AY-11440), also known as chlormadinol acetate or as 3ò,17ñ-diacetoxy-6-chloropregna-4,6-diene-20-one, is a steroidal progestin which was investigated as a progestin-only contraceptive and postcoital contraceptive but was never marketed. It is the diacetate ester of clogestone, which, similarly was never marketed. Clogestone acetate produces chlormadinone acetate as an active metabolite.