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。

This leaves the measurement of nuchal transparency as a potentially useful 1st trimester screening tool.

这使得测量颈部透明作为一种潜在的有用的第一孕期筛检工具。

So after this time any abnormalities causing fluid accumulation may seem to correct themselves and can thus go undetected by nuchal scanning.

所以在这个时候任何异常造成积水可能看起来正确，可以使自己不被发现的颈部扫描。