1. How to remove a Chinese IUD;Stillwell, S.;J Fam Plann Reprod Health Care,2003
2. UNDP/UNFPA/WHO/World Bank Special Programme of Research, Development and Training in Human Reproduction. HRP. The intrauterine device (IUD) – worth singing about;Prog Reprod Health Res,2002
3. Obgyn.net, ultrasound section, ‘Chinese ring’;Bradley, J.,1994
4. Hysteroscopic removal of foreign bodies and its methods of monitoring;Xia, E.; Duan, H.; Huang, X.;Chin Med J,2003
5. A randomised crossover trial comparing thread retrievers with IUD removing forceps;true;Br J Fam Plann,1990