The clinical performance of the Multiload IUD. I. The influence of the endometrial cavity length.

Nine hundred and seventy-four cavimetries were performed using Kurz's Cavimeter prior to the insertion of a MLCu375 IUD. In this trial, we studied the endometrial cavity length of these women. Results of the cavimetries were correlated to IUD complications to determine which uterine sizes were associated with IUD side-effects. The expulsion rate was higher for women with an endometrial cavity length equal to or greater than 45 mm (p < 0.01) for one and two years.