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15 October 1951
Synthetic oestrogen was first made by scientist Luis Miramontes under the direction of Carl Djerassi and George Rosencrantz in the labs of the company Syntex .
22 November 1951
Syntex , of Mexico City, patented norethisterone, an oral progestational agent, which became the basis of later oral contraceptives.
A contraceptive tablet of phosphorated hesperedin was produced by G. D. Searle 's laboratories in Chicago.
August 1953
Scientist Gregory Pincus , working for G. D. Searle , patented a compound very similar to synthetic oestrogen (first made in Syntex labs nearly two years before) and set about using it, as Syntex had...