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

Kim, Gwang Jun; Lee, Eun Sil; Lee, Woo Seok; Lee, Sang Hoon; Jang, Young Jin; Kim, Dong Ho

Original Article

Korean Journal of Obstetrics & Gynecology 2006;49(7):1421-1426.
Published online July 1, 2006.

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

Gwang Jun Kim, Eun Sil Lee, Woo Seok Lee, Sang Hoon Lee, Young Jin Jang, Dong Ho Kim

Department of Obstetric and Gynecology of Chungang University, Seoul, Korea. gjkim@cau.ac.kr

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.

Key Words: Lower uterine segment thickness, Cervical length, Cervical gland thickness, Amniotic fluid index, Birth date