1·Objective To find suitable critical value of fetal nuchal translucency (NT) by ultrasonic testing.
目的通过超声检查寻找合适的胎儿颈项皮肤厚度（NT）临界值。
2·In 11-13 + 6 weeks, fetal nuchal translucency (nt) thickness has become an important index of down's syndrome of early pregnancy screening.
孕11 - 13 + 6周胎儿颈项透明层(NT)厚度已经成为早孕期筛查唐氏综合征的重要指标。
3·Methods Fetal nuchal translucency thickness was measured between 10 ~ 14 weeks of gestation, or nuchal fold thickness after 14 weeks, with serial follow-up ultrasound examinations.
方法于孕10 ~ 14周测量胎儿颈部透明带厚度，或孕14周后测量胎儿颈部皮肤厚度，并随诊观察。
4·In foetuses with a normal number of chromosomes, a thicker nuchal translucency is associated with other fetal defects and genetic syndromes.
在胎儿与正常数目的染色体，一个较厚的颈部半透明是与其他胎儿缺陷和遗传综合征。