6Rowe PJ. Research on intrauterine devices. Annual technical report 1993. World Health Organization. Special Programme of Research Training in Human Reproduction. C, eneva:WHO/HRP/ATR/93/95,1995,139 - 154.
7Chi IC. The multiload IUD - a U. S. researcher's evaluation of an European device. Contraception,1992,46(5) :407.
8The Population Information Program. Center for Communication Programs, Johns Hopkins School of Public Health. IUDs - An update.Population Reports,1995, 22(5) :1.
9Van Os WA. The multiload intrauterine device : development and evaluation. Utrecht, the Netherlands : University of Utrecht, 1987.
10UNDP／UNFPA／WHO／Wodd Bank.Special Programme of Research,Development和Research Training in Human Reproduction:IUD Research Group.A randomized multicentre trial of the Multiload 375 and TCu380A IUDs in pai'ou$women:three—year results.Contraception,1994,49(6):543.
