DETERMINATION OF ACCURACY OF ULTRASONOGRAPHY IN 1st TRIMESTER OF PREGNANCY IN DETECTION OF DATE OF DELIVERY.

J Peop Univ Med Health Sci. 2025:15(3), 108-113. http://doi.org/10.46536/jpumhs/2025/15.03.665

Abstract

INTRODUCTION: The estimated date of delivery carries significant medical, social, and personal
importance for pregnant women and serves as a critical reference for physicians responsible for
ensuring a safe birth. Accurate determination of gestational age is essential in obstetric care. Precise
pregnancy dating enables obstetricians to counsel women at risk of preterm birth (delivery before 37
weeks) regarding potential neonatal outcomes. Earlier evidence has shown that first-trimester
ultrasound using CRL provides more accurate estimation of gestational age compared to later
assessments. OBJECTIVE: To determine the accuracy of Ultrasonography in 1st trimester of
pregnancy in detection of date of delivery. METHODS: this descriptive cross sectional study was
conducted at Obstetrics and Gynaecology department-2 of Bahawal Victoria Hospital, Bahawalpur
from 2022-2023. Al the women aged 18 to 44 years either parity and booking status, presented with
singleton intrauterine pregnancy with presence of participant had a first-trimester ultrasound (7 to
13+6 weeks) with crown–rump length–based dating performed by experienced sonographer and
ultrasound with available records estimated date of delivery (EDD) and the actual date of delivery
were included. The accuracy of ultrasonography in the 1st trimester was considered positive if the
actual date of delivery occurred on the date estimated by the ultrasound performed during early
pregnancy. Data were analyzed using SPSS version 26. RESULTS: Overall mean age of women was
32.56+6.11 years. The mean gestational age at first-trimester ultrasound being 10.15±0.86 weeks and
at delivery was 38.87+2.40 weeks. Accuracy of first-trimester ultrasound in predicting the date of
delivery was found to be high, with 83.6% (92 out of 110) of cases accurately matching the estimated
and actual delivery dates, while 16.4% (18 out of 110) were inaccurate. Maternal age, mode of
delivery, and parity showed no statistically significant differences in accuracy p->0.05.
CONCLUSION: 1st trimester ultrasonography is a reliable method for estimating the expected date
of delivery, with crown–rump length being the most accurate parameter for early gestational dating,
while due few significant limitation of the study further large-scale studies is recommended to
validate these findings and to establish robust evidence for routine clinical use in clinical practice.