title: Fecundity before disease onset in women with rheumatoid arthritis.
abstract: OBJECTIVE
  To examine fecundity prior to disease onset in women with rheumatoid arthritis (RA).
  
  
  METHODS
  Two hundred fifty-nine RA patients with an opportunity for pregnancy were compared with 1,258 control women as part of a prospective case-control study of recent-onset RA in women.
  
  
  RESULTS
  A 12-month or longer interval to pregnancy was found in 42% of RA cases compared with 34% of controls (odds ratio = 1.44, 95% confidence interval 1.10, 1.91). This difference was not accounted for by an older age when attempting to become pregnant among the RA cases compared with the controls. The result was unrelated to rheumatoid factor or HLA-DR4 status.
  
  
  CONCLUSIONS
  Women with RA were found to have decreased fecundity prior to disease onset, compared with control women.
authors.affiliation: Division of Clinical Research, Fred Hutchinson Cancer Research Center, Seattle, WA 98104.
authors.forename: J L
authors.initials: JL
authors.lastname: Nelson
authors.forename: T D
authors.initials: TD
authors.lastname: Koepsell
authors.forename: C E
authors.initials: CE
authors.lastname: Dugowson
authors.forename: L F
authors.initials: LF
authors.lastname: Voigt
authors.forename: J R
authors.initials: JR
authors.lastname: Daling
authors.forename: J A
authors.initials: JA
authors.lastname: Hansen
mesh_terms: D000293:Adolescent; D000328:Adult; D001172:Arthritis, Rheumatoid / Q000453:epidemiology / Q000276:immunology / Q000503:physiopathology*; D016022:Case-Control Studies; D005260:Female; D005298:Fertility / Q000502:physiology*; D015804:HLA-DR4 Antigen / Q000032:analysis; D006801:Humans; D011446:Prospective Studies; D012098:Reproduction; D012217:Rheumatoid Factor / Q000032:analysis; D013997:Time Factors
chemical_list: D015804:HLA-DR4 Antigen; D012217:Rheumatoid Factor