Table 2. Expression of positive and negative markers in in placenta, amniotic membrane and umbilical cord mesenchymal stem cells.

Marker	Placenta MSCs Mean± Sd	Umbilical cord MSCs Mean± Sd	Amniotic membrane MSCs Mean± Sd	P value
CD44	99.93± 0.11	95.89± 0.37	99.47± 0.11	< 0.001
CD73	99.87± 0.11	96.39± 0.43	99.72± 0.02	< 0.001
CD90	99.85± 0.05	98.17± 0.25	99.76± 0.05	< 0.001
CD29	99.78±0.08	98.17± 1.04	44.78± 0.19	< 0.001
CD14	2.44± 0.01	7.52± 0.11	0.793± 0.01	< 0.001
CD45	5.90± 0.10	17.39± 0.08	19.31± 0.59	< 0.001
CD34	0.900± 0.10	1.17± 0.01	.3100± 0.41	0.012
P value	< 0.001	< 0.001	< 0.001