Morphometrics and viral load in IUGR and non-IUGR fetuses categorized based on extreme brain:liver weight ratio.

*Mean log10 copies per mg tissue.Left columns: Means (SD) of fetal weight (g), fetal organ weights (g), brain:organ weight ratios, crown-rump-length (CRL, cm), and viral load (VL) in fetal thymus and endometrium (log10 copies/mg) are presented for IUGR and non-IUGR fetuses categorized based on brain:liver weight ratios. IUGR fetuses have brain:liver weight ratios greater than +1 SD from mean, non-IUGR fetuses have brain:liver weight ratios less than -1 SD from mean. Right columns: P values and beta coefficients (β) obtained by two-level, linear, mixed-effects regression models are presented showing differences between IUGR and non-IUGR fetuses after controlling for covariates possibly influencing fetal weight: sex: 0 = female, 1 = male; LS: effect of a unit increase in litter size (fetal number); Preservation: fetal preservation at termination 0 = viable, 1 = meconium stained; VL thymus = effect of a unit increase in PRRSv RNA concentration (log10 target copies/mg) in fetal thymus collected at termination; LoHi BW: 0 = low BW dam, 1 = high BW dam; ns = not significant (P>0.05).Morphometrics and viral load in IUGR and non-IUGR fetuses categorized based on extreme brain:liver weight ratio.