• Chlamydia trachomatis;
  • conserved epitopes;
  • ectopic pregnancy;
  • fertility;
  • 60-kDa heat shock protein;
  • immunity

Problem  This prospective study was aimed to evaluate whether non-invasive clinical and serologic parameters of tubal disease are predictive for subsequent spontaneous conception and pregnancy outcome after first episode of ectopic pregnancy (EP).

Method of study  Overall, 144 women aged <35 years were enrolled. Outcome of subsequent spontaneous conception was analyzed after 3 years and compared with clinical parameters and antibody responses to Chlamydia trachomatis and epitopes of the 60-kDa chlamydial heat shock protein (CHSP-60).

Results  Antibody response to a conserved epitope of CHSP-60 (amino acids, aa 260–277) was independently correlated with both decreased spontaneous conception and term delivery rates (adjusted odds ratios, OR: 3.6 and 5.4, respectively).

Conclusion  Presence of circulating antibodies to a conserved epitope of the CHSP-60 is associated with a lower spontaneous conception rate, and increased likelihood of adverse pregnancy outcome in women treated by salpingectomy for first episode of EP.