Proligestone, sold under the brand names Covinan and Delvosteron, is a progestin medication which is used in veterinary medicine.

[4] Proligestone is a progestogen, or an agonist of the progesterone receptor (PR).

Proligestone, also known as 14α,17α-propylidenedioxyprogesterone or as 14α,17α-dihydroxyprogesterone cyclic acetal with propionaldehyde, as well as 14α,17α-propylidenedioxypregn-4-ene-3,20-dione, is a synthetic pregnane steroid and a derivative of progesterone and 17α-hydroxyprogesterone.

[1][2][3] Proligestone is marketed under the brand names Covinan and Delvosteron.

[1][2][3] Proligestone is or has been available for veterinary use in Argentina, Australia, Austria, Belgium, Czechoslovakia, France, Germany, Ireland, Italy, the Netherlands, New Zealand, Poland, South Africa, Switzerland, and the United Kingdom.