Table 3. The individual measurements of fetal cranial parameters for predicting cerebral maturation.

Parameters for predicting fetal cerebral maturation	Formula	R2	Standard error (days)	P
HC	9.996*exp (0.004*HC)	0.968	7.84	<0.001
INS	−4.332+1.884*INS−0.015*INS2	0.934	10.08	<0.001
SF	16.17*exp (0.052*SF)	0.815	18.41	<0.001
POF	20.09*exp (0.040*POF)	0.900	15.40	<0.001
CF	20.16*exp (0.039*CF)	0.877	15.26	<0.001

HC, head circumference; INS, insula; SF, sylvian fissure; POF, parieto-occipital fissure; CF, calcarine fissure.