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Table 3 Absolute volumes of the four intracranial compartments in male and female fetuses after the data were grouped into quarters by gestational age

From: Sex differences in fetal intracranial volumes assessed by in utero MR imaging

Variable (cm3)

Gestational age (wks)

Female

Male

Male–female

P

  

Mean

SD

Mean

SD

Mean

 

VV

18–23

3.54

0.76

4.14

1.40

0.60

0.070

 

24–27

4.61

1.47

5.88

1.87

1.27

0.011

 

28–30

6.16

2.01

6.82

2.00

0.66

0.27

 

31–37

7.70

2.36

8.91

2.75

1.21

0.12

EAV

18–23

31.8

8.46

31.2

8.53

− 0.6

0.79

 

24–27

60.2

14.5

73.6

17.2

13.4

0.005

 

28–30

94.5

12.5

102.4

17.8

7.9

0.088

 

31–37

128.7

23.5

138.8

24.0

10.1

0.15

BPV

18–23

44.1

14.3

44.1

13.2

0.07

0.98

 

24–27

91.6

19.3

104.0

20.0

12.4

0.034

 

28–30

140.4

15.5

150.2

22.2

9.8

0.087

 

31–37

236.1

36.4

256.2

38.1

18.1

0.12

TICV

18–23

79.4

22.5

79.5

20.7

0.1

0.99

 

24–27

156.4

32.4

183.5

37.0

27.1

0.010

 

28–30

241.0

23.1

259.4

35.0

18.3

0.040

 

31–37

360.7

54.8

390.8

52.2

30.1

0.056

  1. VV  ventricular volume, EAV  extraaxial volume, BPV  brain parnchymal volume, TICV  total intracranial volume