Comparison of fetal weight and morphometrics in low and high BW gilts following PRRSv inoculation.

Left columns: Mean (SD) fetal and fetal organ weights (g) of live fetuses (VIA, MEC) at termination, 21 days post-inoculation (gestation day 106±1) are presented for low and high birth weight (BW) gilts. Additionally, mean brain:organ weight ratios (SD) and crown-rump-length (CRL, cm) are displayed. Right columns: P values and beta coefficients (β) obtained by two-level, linear, mixed-effects regression models are presented for fixed effects retained in the parsimonious (final) model. β represents the difference between predictor categories or per unit increase in continuous variables. LoHi BW: 0 = low BW dam, 1 = high BW dam; 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; ns = not significant (P>0.05).
Comparison of fetal weight and morphometrics in low and high BW gilts following PRRSv inoculation.