Does the nuchal cord persist? An ultrasound and color-Doppler-based prospective study

作者：Lal Neena^*; Deka Deepika; Mittal Suneeta

来源：Journal of Obstetrics and Gynaecology Research, 2008, 34(3): 314-317.

DOI：10.1111/j.1447-0756.2007.00695.x

• nuchal cord
• persistence
• ultrasound

Aim: To study the persistence of nuchal cord by ultrasound at various periods of gestation.
Methods: Ultrasound was done on 200 consecutive pregnant women and nuchal cord was documented at 18-20, 30-32 and 36-38 weeks' gestation.
Results: The incidence of nuchal cord was 6% at 18-20 weeks, 7.5% at 30-32 weeks, 26.5% at 36-38 weeks and 28% at birth. The persistence of nuchal cord was 8.3% from 18 to 20 to 30-32 weeks, 26.6% from 30-32 to 36-38 weeks and 84.9% from 36-38 weeks to delivery. Using the Friedman test, the change in the presence of nuchal cord was significant (P < 0.001).
Conclusions: Nuchal cord keeps appearing and disappearing over time. Its incidence increases with gestational age and is more likely to persist if it is diagnosed later in pregnancy.

• 出版日期2008-6
• 单位河北医科大学