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Table 3 Testicular Volumes (ml) Obtained by Ultrasound in Normal Children and Adults Reported by 4 Groups Compared with Volumes in Our Study Subjects Obtained Clinically by Formula

From: Testicular volumes revisited: A proposal for a simple clinical method that can closely match the volumes obtained by ultrasound and its clinical application

Age group Osemlak[6] Mean ± SD Goede et al.[7] Mean ± SD Kuijper et al.[21] Mean ± SD Our study subjects (W-ss)3 x 0.64 Mean ± SD
1 month (17) 0.35 ± 0.12   (31) 0.27 ± 0.02  
2 to 12 months (17) 0.5 ± 0.24 (40) 0.48 ± 0.13 (216) 0.44 ± 0.03 0.31 ± 0.02  
2 years (17) 0.55 ± 0.22 (38) 0.46 ± 0.09 0.31  
3 years (17) 0.64 ± 0.19 (36) 0.51 ± 0.15 0.31 (24) 0.46 ± 0.07
4 years (17) 0.78 ± 0.21 (38) 0.51 ± 0.16 0.31
5 years (17) 0.67 ± 0.19 (48) 0.58 ± 0.15 0.31
6 years (17) 0.78 ± 0.24 (42) 0.63 ± 0.26 0.31
7 years (17) 0.68 ± 0.21 (62) 0.65 ± 0.17   (22) 0.56 ± 0.09
8 years (17) 0.81 ± 0.23 (59) 0.66 ± 0.22  
9 years (17) 0.85 ± 0.31 (53) 0.79 ± 0.46   (36) 0.65 ± 0.19
10 years (18) 1.36 ± 0.61 (49) 0.97 ± 0.51  
11 years (18) 1.94 ± 1.41 (60) 1.33 ± 1.03   (50) 2.56 ± 1.24
12 years (17) 3.29 ± 2.99 (55) 2.33 ± 1.77  
13 years (18) 5.37 ± 2.92 (47) 4.42 ± 2.66   (18) 4.28 ± 0.96
14 years (17) 4.98 ± 2.68 (35) 7.31 ± 4.11   (58) 8.01 ± 2.58
15 years (17) 8.71 ± 2.52 (26) 8.69 ± 2.91  
16 years (17) 11.8 ± 4.91 (31) 11.51 ± 3.03   (36) 12.45 ± 1.99
17 years (17) 12.83 ± 3.94 (27) 12.12 ± 2.8  
18 years   (23) 13.73 ± 3.51   (56) 13.16 ± 2.67
Adults Bahk et al.[22] W x H x L x 0.52   (W-ss)3 x 0.64
(1139) *Lt. 13.46 ± 2.65 Rt. 13.29 ± 2.82   (102) 13.12 ± 3.17
W x H x L x 0.71   (W-ss)3 x 0.88
  (1139) Lt. 18.37 ± 3.62 Rt. 18.13 ± 3.85   (102) 18.05 ± 4.36
  1. Legend: (#) Number of observations. The US equation used by Osemlak and Goede et al. and Kuijper et al. was W x H x L x 0.52.
  2. * The equation used by Bahk et al. was W x H x L x 0.71. The volumes were divided by 1.365 to obtain volumes determined with the constant 0.52 (0.71/0.52 = 1.365).