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Table 1 Fetal weight and placental weight and dimensions in males and females at E15 and E20

From: Sex differences in rat placental development: from pre-implantation to late gestation

Variables Male E15 Female E15 Male E20 Female E20 Statistics
Fetal weight (g) 0.208 ± 0.007 0.2062 ± 0.007 2.676 ± 0.038 2.534 ± 0.035 PSex < 0.05
PAge < 0.0001
PInt < 0.05
Placental weight (g) 0.247 ± 0.023 0.217 ± 0.006 0.561 ± 0.01221 0.536 ± 0.012 PSex = 0.05
PAge < 0.0001
PInt = 0.86
Placenta:BW ratio (g/gbw) 1.128 ± 0.059 1.127 ± 0.041 0.181 ± 0.010 0.188 ± 0.011 PSex = 0.92
PAge < 0.0001
PInt = 0.89
Labyrinthine wet weight (g) 0.0863 ± 0.009 0.094 ± 0.006 0.317 ± 0.018 0.306 ± 0.018 PSex = 0.93
PAge < 0.0001
PInt = 0.57
Junctional zone wet weight (g) 0.102 ± 0.008 0.096 ± 0.006 0.184 ± 0.019 0.196 ± 0.022 PSex = 0.88
PAge < 0.0001
PInt = 0.62
Placental length (mm) 12.090 ± 0.352 12.140 ± 0.232 14.080 ± 0.267 13.910 ± 0.196 PSex = 0.84
PAge < 0.0001
PInt = 0.69
Placental width (mm) 11.410 ± 0.245 11.040 ± 0.187 12.650 ± 0.216 12.590 ± 0.241 PSex = 0.38
PAge < 0.0001
PInt = 0.52
Placental depth (mm) 2.979 ± 0.104 2.833 ± 0.079 4.187 ± 0.086 4.056 ± 0.092 PSex = 0.16
PAge < 0.0001
PInt = 0.94
  1. All data are presented as mean ± SEM and analysed by two-way ANOVA for sex with age. †shows significant difference P < 0.01 between sexes from Tukey’s post-hoc analysis. E15 parameters – N = 9 litters, E20 parameters – N = 12-14 litters
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