title: Plasma Xa inhibitory activities and plasma concentrations of norgestrel and ethinyloestradiol in women on oral contraceptive steroids.
mesh_terms: D000293:Adolescent; D000328:Adult; D003276:Contraceptives, Oral / Q000378:metabolism*; D003277:Contraceptives, Oral, Combined / Q000378:metabolism / Q000494:pharmacology; D003278:Contraceptives, Oral, Hormonal / Q000378:metabolism* / Q000494:pharmacology; D004997:Ethinyl Estradiol / Q000097:blood*; D005170:Factor X / Q000037:antagonists & inhibitors* / Q000378:metabolism; D005260:Female; D006801:Humans; D009644:Norgestrel / Q000097:blood*
chemical_list: D003276:Contraceptives, Oral; D003277:Contraceptives, Oral, Combined; D003278:Contraceptives, Oral, Hormonal; D009644:Norgestrel; D004997:Ethinyl Estradiol; D005170:Factor X