Etynodiol
![](/Images/godic/202501/12/Etynodiol.svg2300.png")
![Ethynodiol diacetate synthesis:[3] F. B. Colton, U.S. Patent 2,843,609 (1958 to Searle). Prepn of the 3-acetate, 17-acetate, and diacetate: P. D. Klimstra, U.S. Patent 3,176,013 (1965 to Searle); see also:[4]](/Images/godic/202501/12/Ethynodiol_diacetate_synthesis.svg2301.png")
Etynodiol (INN), or ethynodiol (BAN), is a steroidal progestin which was never marketed. A diacylated derivative, etynodiol diacetate, is used as a hormonal contraceptive.
While etynodiol is sometimes used as a synonym for etynodiol diacetate, what is usually being referred to is actually etynodiol diacetate and not etynodiol.