Table 3. Spearman’s correlation (rho) between birthweight, gestational week and placental morphology by child sex.

	Birthweight (g)				Gestational week
	Males		Females		Males		Females
	Rho	95% CI	rho	95% CI	rho	95% CI	rho	95% CI
Perimeter (cm)	0.34	[0.20, 0.43]	0.42	[0.33, 0.53]	0.26	[0.14, 0.37]	-0.09	[-0.21, 0.04]
Area (cm2)	0.37	[0.25, 0.46]	0.47	[0.39, 0.58]	0.26	[0.14, 0.37]	-0.12	[-0.23, 0.01]
Radius (cm)
Median	0.22	[0.09, 0.32	0.31	[0.21, 0.43]	0.33	[0.21, 0.43]	-0.11	[-0.23, 0.01]
Minimum	0.16	[0.04, 0.28]	0.15	[0.06, 0.3]	-0.02	[-0.14, 0.1]	0.09	[-0.03, 0.21]
Maximum	0.06	[-0.08, 0.17]	0.22	[0.12, 0.35]	0.22	[0.1, 0.34]	-0.16	[-0.28, -0.04]
Umbilical distance from center (cm)	-0.07	[-0.21, 0.03]	0.04	[-0.08, 0.17]	0.14	[0.02, 0.26]	-0.13	[-0.25, -0.003]
Eccentricity
Umbilical cord	-0.12	[-0.24, -0.002]	-0.04	[-0.2, 0.05]	0.07	[-0.05, 0.19]	-0.16	[-0.27, -0.03]
Geometric center	-0.05	[-0.20, 0.04]	-0.03	[-0.2, 0.05]	0.07	[-0.05, 0.19]	0.02	[-0.1, 0.14]
Thickness (cm)
Maximum	0.06	[-0.05, 0.19]	0.14	[0.05, 0.29]	0.13	[0.01, 0.25]	-0.05	[-0.17, 0.08]
Mean	0.05	[-0.06, 0.19]	0.10	[0.05, 0.29]	0.15	[0.02, 0.26]	-0.06	[-0.18, 0.06]
Standard deviation	0.06	[-0.07, 0.18]	0.06	[-0.07, 0.18]	0.06	[-0.02, 0.22]	-0.02	[-0.14, 0.11]