title: Activation of rheumatoid factor during pregnancy.
mesh_terms: D000293:Adolescent; D000328:Adult; D000914:Antibodies, Viral / Q000302:isolation & purification*; D005189:False Positive Reactions; D005260:Female; D006801:Humans; D007075:Immunoglobulin M / Q000302:isolation & purification*; D011247:Pregnancy; D011251:Pregnancy Complications, Infectious / Q000276:immunology*; D011863:Radioimmunoassay; D012217:Rheumatoid Factor / Q000096:biosynthesis*; D012409:Rubella / Q000276:immunology*
chemical_list: D000914:Antibodies, Viral; D007075:Immunoglobulin M; D012217:Rheumatoid Factor