hydroxyprogesterone

noun

hy·​droxy·​pro·​ges·​ter·​one hī-ˌdräk-sē-prō-ˈjes-tə-ˌrōn 

variants or 17α-hydroxyprogesterone

ˌsev-ən-ˈten-ˈal-fə- 

: a synthetic derivative of progesterone used especially in the form of its caproate C₂₇H₄₀O₄ in progestational therapy (as for amenorrhea and abnormal uterine bleeding)