title: Pregnancy and its effect on the risk of developing rheumatoid arthritis.
authors.affiliation: ARC Epidemiology Research Unit, University of Manchester.
authors.forename: J M
authors.initials: JM
authors.lastname: Hazes
mesh_terms: D000328:Adult; D000368:Aged; D001172:Arthritis, Rheumatoid / Q000209:etiology*; D003276:Contraceptives, Oral; D005260:Female; D006801:Humans; D008423:Maternal Age; D008875:Middle Aged; D010298:Parity; D011247:Pregnancy / Q000502:physiology*; D011644:Puerperal Disorders / Q000209:etiology; D012307:Risk Factors; D013997:Time Factors
chemical_list: D003276:Contraceptives, Oral