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Table 4 Testicular volumes – (W-ss)3 X 0.88 by genital stages equivalent to ultrasound W x H x L × 0.71

From: Appraisal of testicular volumes: volumes matching ultrasound values referenced to stages of genital development

Stage Age in years range # of testes Volume in ml quartiles (25% to 75%) Minimum to maximum ml
Stage 1
 1-a 3.4 to 6.5 24 0.50 to 0.71 0.50 to 0.71
 1-b 7.2 to 8.7 24 0.71 to 0.77 0.60 to 0.96
 1-c 8.9 to 13.2 32 0.71 to 1.27 0.60 to 1.27
Stage 1 All 3.4 to 13.2 80 0.71 to 0.96 0.50 to 1.27
Stage 2 10.0 to 15.0 34 2.68 to 4.00 2.16 to 6.52
Stage 3 11.4 to 15.0 22 5.48 to 6.42 4.64 to 7.47
Stage 4 11.7 to 16.9 44 8.27 to 12.32 6.13 to 12.32
Stage 5 13.0 to 17.5 38 15.47 to 17.32 10.71 to 21.46
Adult - All 15.8 to 34.0 100 15.29 to 21.24 10.57 to 21.24
  1. Stage 1a, b, c: The only criterion for separation is age
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