Table 1 shows comparison of estimated foetal weight by various methods with the actual birth weight Mean Actual birth weight with SD was 2593gm + 427 while estimated foetal weight by
The average error of estimated foetal weight was 311.3gms, 454.9gms & 131gms by SFH X AG, Johnson's and Hadlock's methods respectively.
Table 3 shows overestimation, underestimation of foetal weight by various methods among low birth weight and normal weight babies.
Underestimation of foetal weight is more (88%) among normal weight babies by Hadlock's method.
DISCUSSION: Accurate prediction of foetal weight in relation to gestation age, if applied to all pregnancy assists in identifying wrong dates, intrauterine growth restriction.
In the present study the mean of estimated foetal weight by SFH X AG and Hadlock' s method is almost closer to the mean of actual birth weight.
The average error of estimated foetal weight was minimum with the Hadlock's method followed by SFH X AG and Johnson's method which was 131,311 and 455gms respectively.