Table 1 Descriptive Statistics of Macroscopic Parameters.

From: The Density of Cell Nuclei at the Materno-Fetal Exchange Barrier is Sexually Dimorphic in Normal Placentas, but not in IUGR

Descriptive Statistics

Parameters

Group

Clinically normal

IUGR

Sex

Mean ± SD (n)

Mean ± SD (n)

Mean ± SD (n)

GA (week)

♀

39.3 ± 1.0 (23)

37.8 ± 2.6 (22)

38.6 ± 2.1 (45

♂

39.2 ± 0.7 (19)

37.2 ± 2.9 (18)

38.2 ± 2.3 (37)

  

39.3 ± 1.0 (42)

37.5 ± 2.7 (40)

 

BW (g)

♀

3361 ± 576 (23)

2314 ± 461 (22)

2849 ± 732 (45)

♂

3571 ± 453 (19)

2223 ± 551 (18)

2915 ± 833 (37)

  

3456 ± 522 (42)

2273 ± 493 (40)

 

PW (g)

♀

521 ± 124 (23)

341 ± 53 (22)

433 ± 130 (45)

♂

528 ± 106 (19)

362 ± 114 (18)

447 ± 136 (37)

  

524 ± 115 (42)

350 ± 85 (40)

 

PW/BW

♀

0.153 ± 0.025

0.155 ± 0.042

0.154 ± 0.033

♂

0.147 ± 0.019

0.167 ± 0.057

0.157 ± 0.042

  

0.150 ± 0.022

0.161 ± 0.048

 

SA (cm²)

♀

1149 ± 236 (23)

923 ± 211 (22)

1039 ± 247 (45)

♂

1143 ± 244 (19)

906 ± 287 (18)

1028 ± 284 (37)

  

1147 ± 234 (42)

916 ± 241 (40)

 

ROUND

♀

1.18 ± 0.16 (23)

1.20 ± 0.12 (22)

1.19 ± 0.14 (45)

♂

1.21 ± 0.14 (19)

1.22 ± 0.18 (18)

1.21 ± 0.16 (37)

  

1.19 ± 0.15 (42)

1.21 ± 0.15 (40)

 

THICK (cm)

♀

1.7 ± 0.4 (23)

1.5 ± 0.3 (22)

1.6 ± 0.4 (45)

♂

1.8 ± 0.4 (19)

1.5 ± 0.4 (18)

1.7 ± 0.4 (37)

  

1.8 ± 0.4 (42)

1.5 ± 0.3 (40)

 

LD (cm)

♀

20.7 ± 2.9 (23)

18.7 ± 2.6 (22)

19.7 ± 2.9 (45)

♂

20.8 ± 2.9 (19)

18.4 ± 2.6 (18)

19.6 ± 3.0 (37)

  

20.8 ± 2.8 (42)

18.5 ± 2.5 (40)

 

SD (cm)

♀

17.6 ± 1.9 (23)

15.6 ± 1.8 (22)

16.6 ± 2.1 (45)

♂

17.3 ± 1.7 (19)

15.4 ± 3.0 (18)

16.4 ± 2.6 (37)

  

17.5 ± 1.8 (42)

15.5 ± 2.4 (40)

 
  1. The table shows mean values (Mean), standard deviations (SD) and case numbers (n) of gestational age (GA), birth weight (BW) and the gross placental parameters placental weight (PW), ratio of PW to BW (PW/BW), surface area of the placental disc (SA), roundness of the placental disc (ROUND), thickness of the placental disc (THICK), longest diameter of the placental disc (LD), and shortest diameter of the placental disc (SD). PW/BW and Roundness are dimensionless factors; units of the other parameters are shown in brackets. The data are grouped into clinically normal placentas and placentas from pregnancies with intrauterine growth retardation (IUGR), and by gender (female ♀, male ♂). Aggregated data are in italics in the column Sex (aggregated by fetal gender) and the rows Group (aggregated by group).
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