Preciado 190: "[T]he FDA rejected the first version [of the Pill] invented by [Gregory] Pincus and [John] Rock in 1951 and tested at Puerto Rico from 1956 on, because the agency's scientific committee felt it threw doubt on the femininity of American women by suppressing their periods altogether. FDA standards led to Searle's production of a second pill, commercialized in 1959, that was equally effective but could, unlike the first, technologically reproduce the rhythms of a natural menstrual cycle, inducing bleeding that created the illusion of a natural cycle taking place"