Table 1.

Correlation between EFW by both formulae and actual birth weight

	EFW by Hadlock	EFW by Isobe
Engaged head
Actual birth weight
r	0.978	0.993
P value	< 0.001	< 0.001
N	51	51
Non engaged head
Actual birth weight
r	0.994	0.975
P value	< 0.001	< 0.001
N	51	51

Significant P values are given in bold (P < 0.005)