Table 4.

Correlation coefficients (r) between birth weight and placental parameters

Variables	r	P
Placental parameters
Placental weight	0.52	0.03
CWW	0.65	0.003
CDW	0.43	0.07
Cotyledon number	0.46	0.05
Cellular placental parameters
Trophectoderm relative volume	0.392	Ns
Matrix relative volume	0.601	0.008
Fibroblast relative volume	0.331	Ns
Blood vessel relative volume	0.518	0.03
Trophectoderm volume density	−0.242	Ns
Matrix volume density	0.249	Ns
Fibroblast volume density	−0.022	Ns
Blood vessel volume density	0.439	0.06
Surface density of the trophectoderm	−0.396	Ns
Barrier thickness of trophectoderm	0.114	Ns

CWW=cotyledon wet weight; CDW=cotyledon dry weight; Ns=not significant.