Clinical experiences with the Spring Coil intrauterine device: a ten-year follow-up study

In a ten-year follow-up study analysing 1080 cases and 29,138 cumulative woman-months of use, the clinical experiences of the Spring Coil IUD are evaluated using the life table technique, the net cumulative pertinent termination rates calculated for 100 women at the end of the 10th year, were as follows: pregnancy 1.2; expulsion 32.5; bleeding/pain removal 31.6; removal for other medical reasons 6.2. The results support the concept that in problem- and symptom-free cases, routine IUD removal is not necessary.