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  • Title: Five years' experience of intrauterine contraception with the Nova-T and the Copper-T-200.
    Author: Luukkainen T, Allonen H, Nielsen NC, Nygren KG, Pyörälä T.
    Journal: Am J Obstet Gynecol; 1983 Dec 15; 147(8):885-92. PubMed ID: 6650625.
    Abstract:
    A randomized study was performed for the comparison of two copper-releasing intrauterine contraceptive devices (IUDs), the Nova-T and the Copper-T-200, simultaneously in Denmark, Finland, and Sweden. Five years' experience demonstrated that Nova-T users had a significantly lower pregnancy rate than Copper-T-200 users. The Pearl index over 5 years was 0.8 for Nova-T users and 2.0 for Copper-T users. The performance and tolerance of the Nova-T were less affected by parity and age than was the performance of the Copper-T. Infections were treated by removal of the device and with antibiotics. The cumulative rate of removals because of infections and suspected infections was below 5 with both devices over 5 years. The copper wire in the Nova-T has a silver core which prevents corrosion-induced fragmentation of the wire. Hence, the effective lifetime of this device is more than 5 years. The results indicate that the Nova-T, which is easy to insert and remove and is associated with a low pregnancy rate and a low medical termination rate, is a real improvement over other IUDs. A randomized study was performed for the comparison of 2 copper-releasing IUDs, the Nova-T and the Copper T200, simultaneously in Denmark, Finland, and Sweden. 5 years' experience demonstrated that Nova-T users had a significantly lower pregnancy rate than Copper T200 users. The Pearl Index over 5 years was 0.8 for Nova-T users and 2.0 for Copper T users. Performance and tolerance of the Nova-T were less affected by parity and age than was the performance of the Copper T. Infections were treated by removal of the device and use of antibiotics. The cumulative rate of removals due to infection and suspected infection was below 5 with both devices over 5 years. The copper wire in the Nova-T has a silver core which prevents corrosion-induced fragmentation of the wire. Hence, the effective lifetime of this device is more than 5 years. Results indicate that the Nova-T which is easy to insert and remove and is associated with a low pregnancy rate and a low medical termination rate, is a real improvement over other IUDS.
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