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Diethylstilbestrol event Diethylstilbestrol,DES In 1950,it was used against abortion in pregnant women. In 1953,it was proved to be useless. In 1960,it was proved to related with malformation in genital tract and carcinoma of vagina ● In 1971,it was forbidden to be used in pregnant women by FDA. gDiethylstilbestrol event Diethylstilbestrol, DES In 1950,it was used against abortion in pregnant women. In 1953,it was proved to be useless. In 1960,it was proved to related with malformation in genital tract and carcinoma of vagina In 1971, it was forbidden to be used in pregnant women by FDA. 4