Table 2:

Fetal MR imaging biometric parameters of sIUFD fetuses (n = 29), singleton (n = 49), and twins control (n = 28) groups^{^a}

	sIUFD (n = 29) Mean ± SD	Singleton (n = 49)Mean ± SD	Twins Control (n = 28)Mean ± SD	Significance (P Value)
	sIUFD (n = 29) Mean ± SD	Singleton (n = 49)Mean ± SD	Twins Control (n = 28)Mean ± SD	sIUFD vs Singleton	sIUFD vs Twins Control	Twins vs Singleton Controls
FOD (mm)	88.4 ± 4.4	91.5 ± 6.5	90.5 ± 4.9	.01^{^b}	.09	.43
FOD (%)	50.7 ± 18.6	64.2 ± 22.0	59.9 ± 25.9	.01^{^b}	.13	.46
BPD (mm)	68.0 ± 3.9	71.7 ± 6.2	70.4 ± 3.8	.00^{^b}	.02^{^b}	.25
BPD (%)	36.9 ± 17.6	56.9 ± 22.5	46.9 ± 24.4	.00^{^b}	.08	.08
CC (mm)	36.8 ± 2.9	37.9 ± 2.4	37.4 ± 2.0	.08	.31	.39
CC (%)	38.9 ± 22.9	48.2 ± 17.5	43.2 ± 22.3	.07	.48	.32
TCD (mm)	37.8 ± 2.1	39.1 ± 3.7	38.4 ± 2.4	.05^{^b}	.37	.29
TCD (%)	44.1 ± 21.0	51.7 ± 23.3	43.2 ± 23.5	.14	.88	.13
Vermian height (mm)	18.4 ± 1.2	18.4 ± 1.6	18.3 ± 1.1	.94	.84	.89
Vermian height (%)	61.6 ± 18.6	56.5 ± 20.1	57.0 ± 18.3	.27	.35	.92
Vermian_AP (mm)	11.8 ± 1.0	12.0 ± 1.2	11.6 ± 1.0	.59	.32	.12
Vermian_AP (%)	48.6 ± 19.5	46.5 ± 18.5	46.1 ± 16.8	.66	.60	.92
Average lateral ventricles	6.4 ± 1.3	7.3 ± 1.2	7.8 ± 1.6	.01^{^b}	.00^{^b}	.17

Note:—FOD indicates fronto-occipital diameter; BPD, biparietal diameter, CC, corpus callosum; TCD, transcerebellar diameter; AP, anterior-posterior.
↵a Variables are presented as mean (SD). MR imaging centiles in fetal CNS biometry are based on Tilea et al.¹⁶
↵b Statistically significant values.