Open AccessEstimation of Fetal Birth Weight Using Ultra Sonographic Parameters
Author(s) -
Kaveeta Dawaka,
Goutam Das
Publication year - 1970
Publication title -
journal of nepal medical association
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.176
H-Index - 19
eISSN - 1815-672X
pISSN - 0028-2715
DOI - 10.31729/jnma.735
Subject(s) - medicine , fetal weight , birth weight , fetus , in utero , biparietal diameter , obstetrics , pregnancy , body weight , head circumference , genetics , biology
One hundred antenatal patients were studied at term pregnancy at Gauhati Medical College, Guwahati, andfetal birth weight estimation was done in utero Ultrasono-graphically. The parameters measured wereAbdominal Circumference (AC), Biparietal diameter (BPD) and Femur Length (FL), Fetal weightprediction was done with Shepards formula using AC and BPD as well as Hadlocks formula using FL andAC. The scan delivery interval was maintained at 72 hours or less. Results of both formulae were comparedwith the actual fetal birthweight taken within 15 minutes of delivery. With Shepards formula, the predictedfetal weight was within 100 gm of the actual fetal weight in 71% cases, within 150gm in 86% cases, within200 gms in 93% cases and within 250 gms in 98%. With Hadlocks formula, the predicted birthweight waswithin 100 gms of the actual fetal weight in 72% cases, within 150 gms in 83%, within 200 gms in 92%cases and within 300 gms in 98%. The mean percent error calculated as Error % = Predicted weight - actualweight divided by actual weight x 100 was 2.9% with Shepards formula and 3% with Hadlocks. These datathus support a significant correlation between ultrasonographic estimation and actual fetal birth weight.Key Words: Fetal birth weight, AC, BPD, FL