“…Chemically Estetrol is(1R,2R,3R,3aS,3bR,9bS,11aS)-11a-Methyl-2,3,3a,3b,4,5,9b,10,11,11a-decahydro-1H cyclopenta[a]phenanthrene-1,2,3,7-tetrol. [11] Literature survey shows few HPLC methods [6],and UPLC [11] methods are available for Drosperinone and ethinyl estradiol in combination and alone.so an attempt was made for simultaneous and method development of drosperinone and estetrol in combination to develop a sensitive and reproducible method.…”