Oral contraceptives and low antithrombin-3 concentration.
D000991:Antithrombins / Q000097:blood*; D003276:Contraceptives, Oral / Q000494:pharmacology*; D004967:Estrogens / Q000494:pharmacology; D005260:Female; D006801:Humans; D011247:Pregnancy; D011372:Progestins / Q000494:pharmacology
D000991:Antithrombins; D003276:Contraceptives, Oral; D004967:Estrogens; D011372:Progestins