Table 2.

Two-dimensional Measurement Values of Each Average Cranial Model

Variables, Mean (SD)	Unit	G1 (1 mo)	G2 (2–3 mo)	G3 (4–5 mo)	G4 (6–8 mo)	G5 (9–11 mo)	G6 (12–17 mo)
Length	mm	121.9 (3.9)	128.1 (5.4)	133.7 (4.6)	141.6 (5.3)	144.4 (6.0)	150.4 (6.3)
Width	mm	103.1 (5.0)	111.6 (5.4)	123.2 (4.5)	123.4 (5.9)	129.1 (6.7)	131.3 (6.4)
Cephalic index	%	84.6 (4.6)	87.3 (5.4)	92.2 (5.1)	87.2 (4.9)	89.4 (3.6)	87.4 (5.4)
Circumference	mm	357.7 (10.7)	381.0 (13.0)	407.1 (9.0)	420.1 (12.7)	432.4 (18.9)	446.1 (14.4)