Melengestrol acetate

Melengestrol acetate
Clinical data
ATC code None
Synonyms 17α-Acetoxy-16-methylene-6-methyl-6-dehydroprogesterone; 17α-Acetoxy-16-methylene-6-methylpregna-4,6-diene-3,20-dione
CAS Number 2919-66-6
PubChem (CID) 250948
ChemSpider 219803
KEGG D04900
Chemical and physical data
Formula C25H32O4
Molar mass 396.519 g/mol
3D model (Jmol) Interactive image

Melengestrol acetate (INN, USAN), also known as 17α-acetoxy-16-methylene-6-methyl-6-dehydroprogesterone, is a steroidal progestin that is used in veterinary medicine.[1] It is not approved for use in humans, and is instead used as an implantable contraceptive for captive animals in zoos and other refuges,[2] and is also used as a feed additive to promote growth in cattle, a purpose it is licensed for in the United States and Canada.[3] It is an acetate ester of melengestrol, which in contrast, is not used in either animals or humans.[1]

See also


  1. 1 2 David J. Triggle (1997). Dictionary of pharmacological agents. London: Chapman & Hall. p. 1269. ISBN 0-412-46630-9.
  2. Asa, C.S.; Porton, I.J. (2010). "Chapter 34: Contraception as a Management Tool for Controlling Surplus Animals". In Kleiman, D.G.; Thompson, K.V.; Baer, C.K. Wild Mammals in Captivity: Principles and Techniques for Zoo Management (2nd ed.). Chicago, IL: University of Chicago Press. pp. 469–482. ISBN 9780226440118. Retrieved 17 March 2016.
  3. Jack F. Kay (26 November 2009). Analyses for Hormonal Substances in Food-Producing Animals. Royal Society of Chemistry. p. 139. ISBN 978-0-85404-198-5. Retrieved 27 May 2012.
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