<prompt> In case of secondary amenorrhea who fails to get withdrawal bleeding after taking Estrogen and Progesterone, the fault lies at the level ofPituitaryEndometriumOvaryHypothalamus  <response>: Secondary AmenorrheaDefinition:In women who have menstruated previously, no menses for an interval of time equivalent to a total of at least three previous cycles or 6 monthsUterus must contain a functional endometrium that can respond to the actions of ovarian sex steroid hormones, estrogen and progesteroneWhen estrogen and progesterone both were given and no menstruation at the end, the pathology lies in the endometriumCauses:Tuberculosis, SchistosomiasisPostabortal or puerperal curettageAshermans syndrome 