Korean J Obstet Gynecol.  2006 Jul;49(7):1421-1426.

Ultrasonographic factors related with prediction of delivery day in term singleton pregnancy

• Kim GJ
• Lee ES
• Lee WS
• Lee SH
• Jang YJ
• Kim DH

Abstract

OBJECTIVE
The aim of this study was to find out the relating factors with the actual delivery day in term singleton pregnancy.
METHODS
The 52 patients with singleton gestation were visited weekly and measured for their lower uterine segment (LUS) thickness, cervical length and cervical gland thickness by transvaginal ultrasonography and for amnionic fluid index (AFI) by transabdominal ultrasonography from 36 weeks of gestation until birth. Regression analysis was used to find out the relevance between these factors and remaining days to birth.
RESULTS
There was a significant relationship between cervical length and remaining days to birth in term pregnancy, which could be described as a mathematical equation (remaining days for delivery = 6.12 + 0.24 x cervical length (mm) r=0.29, p<0.01). However, no relationship was found between factors such as LUS, AFI, and cervical gland thickness and remaining days to birth.
CONCLUSION
Our results suggest that the actual delivery day in term singleton pregnancy might be predicted with cervical length.

Keyword

Lower uterine segment thickness; Cervical length; Cervical gland thickness; Amniotic fluid index; Birth date

MeSH Terms

Amnion
Amniotic Fluid
Female
Humans
Parturition
Pregnancy*
Ultrasonography