. 2012 Jan 20;302(6):H1261–H1273. doi: 10.1152/ajpheart.00776.2011

Table 4.

Measurements of the fetoplacental arterial tree as measured by micro-CT

	CD1 Mice			B6 Mice
	E13.5	E15.5	E17.5	E13.5	E15.5	E17.5
No. of placentas/group	8	9	8	7	10	8
Vascular volume, mm³	1.51 ± 0.09^a	2.08 ± 0.16^b	2.41 ± 0.19^b	1.73 ± 0.08^a	2.14 ± 0.07^b	2.74 ± 0.16^c
Vascular depth, mm	0.92 ± 0.03^a	1.15 ± 0.02^b	1.30 ± 0.04^b	0.86 ± 0.04^a	1.01 ± 0.04^a^,^*	1.32 ± 0.04^b
Vascular span, mm	6.27 ± 0.10	6.58 ± 0.11	6.48 ± 0.07	6.44 ± 0.07	6.25 ± 0.07	6.66 ± 0.05
Umbilical artery diameter, mm	0.32 ± 0.02^a^,^*	0.46 ± 0.01^b	0.54 ± 0.01^c	0.39 ± 0.02^a	0.51 ± 0.02^b	0.50 ± 0.01^b
No. of vessel segments	1136 ± 111	1117 ± 79	1164 ± 78	1358 ± 52	1368 ± 80	1359 ± 61
Total length of vasculature, mm	261 ± 14^a	291 ± 15^a	324 ± 14^b	278 ± 6^a	299 ± 8^a	332 ± 9^a
Diameter scaling coefficient	−2.82 ± 0.10^a	−2.77 ± 0.06^a	−3.04 ± 0.25^a	−3.03 ± 0.04^a	−3.05 ± 0.08^a	−3.51 ± 0.21^b^,^*
Length-to-diameter ratio	2.67 ± 0.70	2.82 ± 0.63	2.91 ± 0.82	2.36 ± 0.59	2.32 ± 0.53	2.37 ± 0.65

Data are means ± SE.

^a,b,c

Different letters show a significant difference between gestational ages (P < 0.05);

P < 0.05, significant differences between strains at the same gestational age as determined by two-way ANOVA followed by Tukey post hoc tests.