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Sex Transm Dis. 2005 Jun;32(6):377-81.

Ectopic pregnancies and reproductive capacity after Chlamydia trachomatis positive and negative test results: a historical follow-up study.

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Research Unit for General Practice, Aarhus, Denmark.



Recent studies have shown that women with Chlamydia trachomatis-positive test results worry about their future fertility.


The goal of this study was to give women infected with C. trachomatis a fertility prognosis by analyzing ectopic pregnancies and birth rates


An historical follow-up study in a cohort of 22,264 women tested for the infection was conducted.


Cox regression analysis with time-dependent covariates showed that women with at least 1 C. trachomatis-positive test result had a lower incidence rate of ectopic pregnancy than women with negative test results only (adjusted hazard ratio, 0.55; 95% confidence interval [CI], 0.31-0.96). We found comparable birth rates in the 2 groups (adjusted hazard ratio, 0.92; 95% CI, 0.84-1.00).


Counseling of women with a C. trachomatis-positive test result should emphasize the benefit of detection and treatment of the infection in terms of future morbidity.

[Indexed for MEDLINE]

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