早孕胎儿宫内诊断是八十年代国际上引人瞩目的一项应用技术。改进取材工具,对开展产前诊断,推动优生、提高人口素质,具有重要意义。改良的绒毛取材器的设计目前国内外经宫颈活检绒毛取材器,普遍存在三大问题,急待解决:1.定位不准;2.拔芯后移位;3.多不耐高温消毒。针对上述问题,我们 Early pregnancy fetal intrauterine diagnosis is an international attention in the eighties an application of technology. Improve the tools, drawing on prenatal diagnosis, promote eugenics, improve the quality of the population, is of great significance. At present, there are three major problems in the biopsy of cervix biopsy at home and abroad, which are urgently needed to be solved: 1. Inaccurate positioning; 2. Displacement after pulling the core; 3. Most of them are not resistant to high temperature disinfection. For the above problem, we