title: Rheumatoid factor and pregnancy.
mesh_terms: D000293:Adolescent; D000328:Adult; D001782:Blood Donors; D004797:Enzyme-Linked Immunosorbent Assay; D005260:Female; D006801:Humans; D007075:Immunoglobulin M / Q000302:isolation & purification*; D011247:Pregnancy; D012217:Rheumatoid Factor / Q000302:isolation & purification*
chemical_list: D007075:Immunoglobulin M; D012217:Rheumatoid Factor