TABLE 3.

Combined fetal and neonatal data sets that are statistically best fit by nonlinear regression, where y = a₂ + (a₁ − a₂) / (1 + e ^{(K0 – dPC)/slope)}

Parameter	Equation	R2
LV mononucleation (%)	2.976 + 100.824/(1+ e−(135.1 − dPC)/11.31)	0.9482
LV binucleation (%)	−3.143 + 94.173/(1+ e(133.8 − dPC)/10.57)	0.9459
RV mononucleation (%)	10.96 + 89.84/(1+ e−(133.4 − dPC)/8.802)	0.9537
RV binucleation (%)	−0.7731 + 87.8031/(1+ e(133.1 − dPC)/8.755)	0.9548