is usually being referred to is actually, in general, hydroxyprogesterone caproate. Chemistry 17α-OHP, also known as 17α-hydroxypregn-4-ene-3,20-dione, is a naturally occurring pregnane steroid. It features ketone groups at the C3 and C20 positions, a hydroxyl group at the C17α position, and a double bond between the C4 and C5 positions. 17α-OHP is the parent compound of a class of progestins referred to as the 17α-hydroxyprogesterone derivatives. Among others, this class of drugs includes chlormadinone acetate, cyproterone acetate, hydroxyprogesterone caproate, medroxyprogesterone acetate, and megestrol acetate. Society and culture Generic names Hydroxyprogesterone is the generic name of 17α-OHP and its and . See also 11α-Hydroxyprogesterone 5α-Dihydroprogesterone 20-Dihydroprogesterone 11-Deoxycorticosterone 11-Deoxycortisol 17α-Methylprogesterone 19-Norprogesterone 19-Nortestosterone References Antimineralocorticoids Diketones Glucocorticoids Pregnane X receptor agonists Pregnanes Progestogens