. 2012 May 4;153(7):3457–3467. doi: 10.1210/en.2011-1921

Table 3.

Analysis of labyrinth and spongiotrophoblast areas, placental proliferation, and apoptosis at E18.5

	Groups	Labyrinth	Spongiotrophoblast
Total area (%)	FB	52.7 ± 4.2^a	40.9 ± 3.4^a
Total area (%)	IVF	53.7 ± 7.2^a	37.0 ± 7.3^a
Ki67 positive cells (%)	FB	28.50 ± 9.2^a	36.59 ± 7.6^a
Ki67 positive cells (%)	IVF	57.96 ± 10.8^b	62.50 ± 7.8^b
Cleaved caspase-3 positive cells (%)	FB	5.2 ± 2.7^a	7.1 ± 3.5^a
Cleaved caspase-3 positive cells (%)	IVF	5.8 ± 2.7^a	6.4 ± 2.9^a

n = 6 placenta per group; each placenta originated from a different litter.

^a,b

Significantly different values (P < 0.05). Different superscripts if P < 0.05.