目的探讨NT增厚常见的原因与结局。方法对来我院检查的3例NT增厚胎儿进行随访与观察。结果 2例于14周及15周停止发育,1例到20周做羊水穿刺诊断为性染色体异常。结论 NT增厚不要轻视,动态观察及羊水穿刺诊断是必须要做到的。 Objective To investigate the common causes and outcomes of NT thickening. Methods Three cases of NT thickened fetus who were examined in our hospital were followed up and observed. Results Two cases stopped developing at 14 weeks and 15 weeks, and amniocentesis was diagnosed as sex chromosome abnormalities from 1 week to 20 weeks. Conclusion NT thickening do not underestimate the dynamic observation and amniocentesis diagnosis must be done.