Synonyms: 6.alpha.-Fluoro-17-hydroxyprogesterone, acetate;6alpha-Fluoro-17-hydroxypregn-4-ene-3,20-dione acetate;Pregn-4-ene-3,20-dione, 17- (acetyloxy)-6-fluoro-, (6.alpha.)-;Pregn-4-ene-3,20-dione, 6.alpha.-fluoro-17-hydroxy-, acetate;Progesterone, 6.alpha.-fluoro-17-hydroxy-, acetate