Liedholm P, Astedt B
Int J Gynaecol Obstet. 1976;14(6):557-8. doi: 10.1002/j.1879-3479.1976.tb00108.x.
In about 5 000 copper-IUD insertions 5 cases of perforation were found. One woman had 2 devices inserted, both of them perforated. Copper-T was responsible for 3 corporal perforations and copper-7 for 2 corporal and 1 cervical perforation.
在约5000例铜宫内节育器置入术中，发现5例穿孔。1名女性置入了2个节育器，均发生穿孔。铜T型节育器导致3例体腔穿孔，铜7型节育器导致2例体腔穿孔和1例宫颈穿孔。
