title: Chlamydial serologic studies and recurrent spontaneous abortion.
abstract: OBJECTIVE
  Our purpose was to investigate the putative association between immunoglobulin G antibodies to Chlamydia trachomatis and recurrent spontaneous abortions.
  
  
  METHODS
  Sera from 106 idiopathic recurrent aborters and 81 of their partners were tested for immunoglobulin G antichlamydial antibodies by whole inclusion immunofluorescence and compared with 3890 sera from a general antenatal population. Positive sera were further investigated by microimmunofluorescence to determine species (Chlamydia trachomatis, Chlamydia pneumoniae, Chlamydia psittaci) specificity.
  
  
  RESULTS
  Twenty-six (24.5%) of women with recurrent spontaneous abortions had immunoglobulin G antichlamydial antibodies compared with 28 (34.6%) of their partners (chi 2 2.25, p < 0.05) and 788 (20.3%) of the general antenatal population (chi 2 1.16, p < 0.05), and the incidence of antibody positivity showed no trend with increasing number of previous abortions. Fourteen women with recurrent spontaneous abortions had antibodies to Chlamydia trachomatis, 12 to Chlamydia pneumoniae. The prevalence of antibodies to C. trachomatis did not differ significantly between women with recurrent spontaneous abortions and their partners, but the male partners had a significantly (p = 0.005) higher prevalence of Chlamydia pneumoniae antibodies. Chlamydial antibody seropositivity did not correlate with subfertility or subsequent pregnancy outcome.
  
  
  CONCLUSIONS
  There is no association between immunoglobulin G antibodies to Chlamydia trachomatis and recurrent spontaneous abortion.
authors.affiliation: University Department of Medical Microbiology, Simpson Memorial Maternity Pavilion, Edinburgh, United Kingdom.
authors.forename: R
authors.initials: R
authors.lastname: Rae
authors.forename: I W
authors.initials: IW
authors.lastname: Smith
authors.forename: W A
authors.initials: WA
authors.lastname: Liston
authors.forename: D C
authors.initials: DC
authors.lastname: Kilpatrick
mesh_terms: D000026:Abortion, Habitual / Q000209:etiology / Q000276:immunology*; D000328:Adult; D000907:Antibodies, Bacterial / Q000097:blood*; D016022:Case-Control Studies; D002690:Chlamydia Infections / Q000150:complications*; D002692:Chlamydia trachomatis / Q000276:immunology*; D016993:Chlamydophila pneumoniae / Q000276:immunology; D005260:Female; D006801:Humans; D007074:Immunoglobulin G / Q000097:blood; D008297:Male; D011247:Pregnancy / Q000276:immunology
chemical_list: D000907:Antibodies, Bacterial; D007074:Immunoglobulin G