the estimated weight against gestational age ( ga ) curve so obtained best fitted a third-degree equation , wt = 1443.4 - 32.32 x ga + 0.203 x ga2 - 0.000215 x ga3 ( r2 = 0.978 ) , tallying closely with the birth weight curve obtained in the same population from 4743 pregnancies where gestational age had been assessed by ultrasound in early pregnancy .
C0005910
weight
C0005612
birth weight