Quantitative Anatomy of the Growing Lungs in the Human Fetus
Table 2
Numerical data of the growing right lung.
Age [weeks]
Right lung (all parameters are expressed in millimeters [mm])
Transverse diameter
Sagittal diameter
Height
Base circumference
Anterior margin length
Posterior margin length
Mean
SD
Mean
SD
Mean
SD
Mean
SD
Mean
SD
Mean
SD
16
2
11.35
0.62
21.56
0.02
15.28
0.86
50.48
1.08
21.59
2.88
23.79
2.35
17
8
13.14
1.56
22.94
2.53
15.12
1.15
54.77
14.84
23.89
2.75
23.94
1.92
18
10
13.43
2.01
25.57
4.05
16.43
2.31
66.02
9.64
24.64
4.36
26.42
2.67
16–18
20
13.10(a)
1.79
24.12(a)
3.54
15.79(a)
1.87
59.97(a)
12.86
24.03(a)
3.61
25.17(a)
2.59
19
6
17.21
1.17
30.46
4.06
18.62
2.90
84.09
9.71
30.83
1.35
31.32
4.01
20
14
16.90
2.46
29.51
3.98
17.95
2.62
75.50
8.84
29.01
3.05
30.91
3.55
21
7
19.96
2.23
33.89
7.64
19.72
1.86
94.02
12.55
33.33
3.03
34.99
2.83
19–21
27
17.76(b)
2.49
31.50(b)
4.76
19.18(b)
2.78
82.21(b)
10.49
30.53(b)
2.24
32.06(b)
3.79
22
5
18.51
2.99
37.16
5.43
21.70
1.40
92.08
19.42
35.58
4.27
35.36
2.04
23
6
20.37
1.79
38.35
4.81
22.00
2.07
98.93
9.78
37.42
3.14
37.50
2.65
24
6
23.23
2.12
41.23
5.56
22.82
3.11
110.66
9.95
39.14
1.28
40.76
2.26
25
3
23.36
4.80
41.94
3.03
25.22
3.57
113.80
11.68
42.13
3.94
40.55
2.97
22–25
20
21.21(c)
3.24
39.45(c)
5.02
22.66(c)
2.62
102.97(c)
14.78
38.19(c)
3.63
38.40(c)
2.69
Note: between the three age groups of 16–18, 19–21, and 22–25 weeks, the means for all the pulmonary parameters studied marked by letters (a), (b), and (c) in every column differ significantly: (a) versus (b) , (a) versus (c) , and (b) versus (c) .
