norethisterone
Noun
Meaning
norethisterone (uncountable)
(pharmacology) A synthetic steroid hormone, 19-nor-17α-ethynyltestosterone (C20H26O2), which has actions similar to those of progesterone and is used chiefly for contraception.
Synonyms
Examples
Australia The first oral contraceptive introduced outside the United States was Schering 's Anovlar ( norethisterone acetate 4 mg + ethinyl estradiol 50 µg) on January 1, 1961 in Australia.
First-generation progestins include noretynodrel, norethisterone, norethisterone acetate, and etynodiol diacetate… These compounds have the lowest potency and relatively short half-lives.
Frank B. Colton at Searle in Skokie, Illinois had synthesized the orally highly active progestins noretynodrel (an isomer of norethisterone) in 1952 and norethandrolone in 1953.