. 2008 Jun 4;3(6):e2302. doi: 10.1371/journal.pone.0002302

Table 2. Pearson correlation analysis data showing significant relationships between the proteins and PaO₂ concentration in the different compartments of the early gestational sac.

	Pearson Correlation
Placental bed blood (PB)	Activin A vs PlGF (r = 0.57, P<0.02) PlGF vs sFlt-1 (r = 0.57, P<0.01) PlGF vs sEng (r = 0.69, P = 0.001) sFlt-1 vs sEng (r = 0.42, P<0.05) sFlt-1 vs Po2 (r = −0.44, P<0.032)
Maternal serum (MS)	Activin A vs PlGF (r = 0.52, P = 0.005) Activin A vs sEng (r = 0.38, P = 0.05)
Coelomic Fluid (CF)	Inhibin A vs activin A (r = 0.6, P = 0.02)
Placental Extracts (PEx)	Inhibin A vs activin A (r = 0.73, P<0.001) VEGF vs PlGF (r = 0.67, P<0.001) VEGF vs sEng (r = 0.63, P<0.001) PlGF vs sEng (r = 0.54, P = 0.001)
Inhibin A	Gestation vs PB (r = −0.45, P = 0.02), PaO2 vs PB (r = −0.5, P = 0.01)
Activin A	CF vs MS (r = 0.8, P<0.001) CF vs gestation (r = 0.74, P<0.001) MS vs gestation (r = 0.54, P = 0.002)
sFlt-1	PaO2 vs PB (r = −0.44, P<0.05) CF vs gestation (r = 0.45, P<0.05)
PlGF	CF vs MS (r = −0.5, P = 0.025) MS vs gestation (r = 0.61, P<0.001)
Endoglin	MS vs PB (r = 0.56, P<0.01)

Table 2. Pearson correlation analysis data showing significant relationships between the proteins and PaO2 concentration in the different compartments of the early gestational sac.