The superior nuchal line is not always a reliable external anatomical mark.

上项线不是一个可靠的浅表解剖学标志。

Objective: To evaluate effect of nuchal cord on the delivery pattern.

目的：探讨脐带绕颈在评估分娩方式中的价值。

It is important to distinguish the nuchal lucency from the underlying amnionic membrane.

重要的是要区分颈部从底层透亮羊膜膜。

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。

AIM: to observe the fine anatomic structure and the structural status of the human nuchal ligament.

目的：观察人类项韧带的精细解剖结构及形态。