title: Rate of metabolism of norethisterone in women from different populations.
abstract: The rate of metabolism of orally administered norethisterone was compared in fourteen centres by measuring plasma levels of the steroid by radioimmunoassay at varying times after oral administration of a 1 mg dose. The inter-centre differences were of the same order as the intra-centre differences. Variations in metabolism appeared not to be due to variations in body size.
mesh_terms: D000328:Adult; D005260:Female; D006207:Half-Life; D006801:Humans; D009640:Norethindrone / Q000097:blood / Q000378:metabolism*
chemical_list: D009640:Norethindrone