Table 1.

Effect of age and sex on absolute weights and body measurements of male and female foetuses at Gestational Day (GD) 70 and 90. Mean values for morphometric measurements and absolute body and main organs weights at GD 70 and 90 in female (F) and male (M) foetuses.

		70		90		MSE a	p-Value
							Same Age F vs. M		Same Sex 70 vs. 90		Age × Sex
		F	M	F	M		70	90	F	M
Body morphometry	Body length (cm)	20.2	20.2	29.1	29.5	0.495	0.343	0.746	<0.001	<0.001	<0.001
	Occipito-nasal length (cm)	7.7	6.6	8.4	9.2	0.403	0.045	0.193	0.241	<0.001	<0.001
	Biparietal diameter (cm)	3.0	2.9	3.9	4.1	0.071	0.748	0.173	<0.001	<0.001	<0.001
	Trunk diameter (cm)	2.7	2.9	4.2	4.6	0.117	0.177	0.028	<0.001	<0.001	<0.001
	Trunk circumference (cm)	11.0	11.4	16.7	17.5	0.355	0.222	0.221	<0.001	<0.001	<0.001
	Abdominal circumference (cm)	9.3	9.8	14.5	15.3	0.439	0.294	0.277	<0.001	<0.001	<0.001
Body weight	Body weight (g)	171.9	180.1	542.0	616.4	18.969	0.453	0.09	<0.001	<0.001	<0.001
	Head weight (g)	46.8	46.6	130.4	138.9	4.086	0.948	0.340	<0.001	<0.001	<0.001
	Carcass weight (g)	91.3	99.1	309.2	362.7	12.160	0.268	0.06	<0.001	<0.001	<0.001
Viscerae and main organs weight	Brain weight (g)	6.5	6.5	19.9	19.9	0.378	0.968	0.996	<0.001	<0.001	<0.001
	Viscerae weight (g)	26.3	27.7	86.5	96.5	3.245	0.495	0.168	<0.001	<0.001	<0.001
	Heart weight (g)	1.4	1.5	4.7	5.2	0.193	0.616	0.233	<0.001	<0.001	<0.001
	Lungs weight (g)	6.1	6.3	17.4	20.4	0.691	0.662	0.072	<0.001	<0.001	<0.001
	Liver weight (g)	7.8	7.7	15.8	18.4	0.905	0.827	0.172	<0.001	<0.001	<0.001
	Intestine weight (g)	5.2	4.9	21.7	25.2	1.089	0.599	0.187	<0.001	<0.001	<0.001
	Spleen weight (g)	0.2	0.2	1.2	1.5	0.053	0.425	0.018	<0.001	<0.001	<0.001
	Kidneys weight (g)	2.2	2.2	5.6	6.1	0.260	0.951	0.375	<0.001	<0.001	<0.001

^a MSE = Mean square error.