Last week, with newly announced approval by the Food and Drug Administration of three more oral contraceptives, American women and their doctors had a total of six to choose from.
By federal law, all are available on prescription only. They are:
> Enovid, the longest on the market, made by Chicago's G. D. Searle & Co. in large-dose tablets.
> Enovid-E, just released, a miniaturized version of Enovid.
> Ortho-Novum (Johnson & Johnson's subsidiary, Ortho Pharmaceutical Corp.), on the market since 1962 in a full-dose tablet.
> Ortho-Novum-2, a reduced-dose form on sale since last fall....