Even today, norethindrone, though not norethynodrel, is still used by millions of women as an oral contraceptive.    From Wordnik.com.  [Heidi Kingstone: What Happened to the Father of the Pill? Whitewashed Out of History...] Reference

Both Syntex's norethindrone and Searle's norethynodrel were approved in 1957 by the FDA for the treatment of menstrual disorders.    From Wordnik.com.  [Heidi Kingstone: What Happened to the Father of the Pill? Whitewashed Out of History...] Reference

One and one-half years after the first publication by the Syntex group, chemists at G.D. Searle -- a company for which Pincus consulted, synthesized a close relative, norethynodrel, which, as shown by Pincus -- is largely converted in the stomach into norethindrone.    From Wordnik.com.  [Heidi Kingstone: What Happened to the Father of the Pill? Whitewashed Out of History...] Reference