etonogestrel

noun

et·​o·​no·​ges·​trel ˌet-ə-nō-ˈjes-trəl 

: a synthetic progestin C₂₂H₂₈O₂ used alone or in combination with an estrogen to prevent pregnancy

Note: Etonogestrel is marketed under the trademark Nexplanon and when combined with ethinyl estradiol under the trademark NuvaRing.