A comparison of the fetal measurements for sonographic estimation of gestational age at 10 to 14 completed weeks

Dr. H.S. Wong

Volume : VII, Issue : XII, December - 2017

A comparison of the fetal measurements for sonographic estimation of gestational age at 10 to 14 completed weeks

Dr. H. S. Wong

Abstract :

Objectives: To compare the correlation of sonographic fetal measurements to the estimated gestational age and foot length at 10–14 completed weeks’ gestation

Methods: The fetal measurements in 35 routine Obstetric scans performed at 10–14 completed weeks’ gestation in women attending antenatal care were obtained and compared to the estimated gestational age and the foot length.

Results: The crown rump length (CRL), biparietal diameter (BPD), head circumference (HC), abdominal circumference (AC) and femur length (FL) showed a linear correlation with the estimated gestational age (GA) and foot length (FT) (p<0.001), with the least correlation observed with CRL. A combination of fetal parameters correlated with FT or GA better without CRL (R² = 0.881 and 0.817 respectively) than with (R² = 0.685 and 0.560 respectively).

Conclusion: The fetal BPD, HC, AC and FL correlate better with GA and FT compared with CRL alone or in combination at 10–14 weeks gestation.