title: Two-year rates for Nova T and Copper T in a comparative study.
abstract: A random assignment comparative study between Nova T and Copper T 200 after two years of use revealed that the Nova T resulted in a significantly lower pregnancy rate than the Copper T. The study was performed simultaneously in Denmark, Sweden and Finland. The pregnancy rate in Nova T users was lower than in Copper T users in every country and in every age and parity group. There was no clinic effect in the pregnancy rate of Nova T users. The other termination rates of these two devices were not significantly different. The first segment continuation rates at two years of postmenstrual insertions were 64.7 for Nova T and 65.5 for Copper T 200. It seems that Nova T is an improved copper-releasing IUD.
mesh_terms: D000206:Actuarial Analysis; D000328:Adult; D002986:Clinical Trials as Topic; D004311:Double-Blind Method; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007433:Intrauterine Device Expulsion; D007435:Intrauterine Devices, Copper; D008598:Menstruation; D011247:Pregnancy