Correlation between neck circumference of pregnant woman in late trimester of pregnancy and umbilical artery blood flow
Abstract：Objective To investigate the correlation between neck circumference of pregnant woman in late trimester of pregnancy and systolic/diastolic ratio (Vs/Vd) of umbilical artery.Methods One hundred and twenty-six pregnant women in late trimester of pregnancy were enrolled in the study.According to the neck circumference,these pregnant women were divided into two groups: group A (n=81) in which the pregnant women with neck circumference < 34.7cm,and group B (n=45) in which the pregnant women with neck circumference ≥34.7cm.The correlation between neck circumference of pregnant woman in late trimester of pregnancy and Vs/Vd ratio of umbilical artery was analyzed.Results The detection rate of Vs/Vd≥3.0 in group B was significantly higher than that in group A (64.4％ vs 19.8％,χ2=25.166,P<0.01).The multiple factor logistic regression analysis showed that neck circumference ≥34.7cm (r=5.167,95％,CI:2.138～12.491,P<0.01) was an independent risk factor of systolic/diastolic ratio≥3.0.After the pregnant women with pregnancy-related disease were excluded, the detection rate of Vs/Vd≥3.0 in group B was also significantly higher than that in group A (47.8％ vs 11.5％,χ2=14.728,P<0.01).The multiple factor logistic regression analysis showed that neck circumference ≥34.7cm (r=7.028, 95％CI:2.403～20.555,P<0.01) was an independent risk factor of systolic/diastolic ratio≥3.0.Conclusion The neck circumference of pregnant woman is closely correlated to Vs/Vd ratio of umbilical artery,which suggests that obesity is related with placental function abnormality, even in healthy pregnant women.
Keywords：neck circumferenceumbilical artery blood flowlate trimester of pregnancy
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 2910-2914 )