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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