title: Is pregnancy a risk factor in the causation of rheumatoid arthritis?
mesh_terms: D000367:Age Factors; D001172:Arthritis, Rheumatoid / Q000453:epidemiology / Q000209:etiology* / Q000517:prevention & control; D003276:Contraceptives, Oral / Q000627:therapeutic use; D005260:Female; D012739:Gonadal Steroid Hormones / Q000378:metabolism; D006801:Humans; D008393:Marriage; D010298:Parity; D011247:Pregnancy; D011248:Pregnancy Complications; D012306:Risk
chemical_list: D003276:Contraceptives, Oral; D012739:Gonadal Steroid Hormones