Objective To analyze the effect of two types of IUDs, TCu 380A and GyneFix on the positive rate of Chlamydia Trahmatis (CT).Methods The TCu380A and GyneFix IUDs were compared in a randomized was for the one-year and two-year positive rate of Chlamydia Trahmatis (CT) and with the control respectively.Results The one-year positive rate of CT antigens was 5. 63% of TCu380A and two-year was 4. 92%； the one year positive rate of CT antigens was 4. 62% and two-year was 5. 08% of GyneFix. There was no significant difference in the positive rate of CT antigen between the TCu 380A IUD, and CryneFix IUDs groups, while there were sig-nificant differences between the TCu380A IUD, GyneFix IUD and the controls ( 15. 18% ) respectively.Conclusion Both IUDs provide highly effective protection against CT infection.
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