Table 2. Percentages of seminiferous tubules containing germ cells at
various stages of spermatogenic maturation or showing atrophy after direct
testicular cooling varying with time after treatment (mean ± SE, n = 7
in each group)
Days After Cooling (Group Number)
Sertoli Cells Only or Plus Germ Cells Developed to Early Spermatogenic Stages
Germ Cell Maturation to Spermatocyte Stage or Beyond*
Tubular Destruction or Atrophy
7 (G6)
25.8 ± 5.8
67.6 ± 5.2
6.6 ± 2.8
14 (G7)
29.3 ± 7.0
69.0 ± 6.9
1.7 ± 0.9
21 (G8)
45.5 ± 7.8
39.6 ± 11.6
14.9 ± 8.4
35 (G9)
52.1 ± 7.1
40.3 ± 9.3
7.5 ± 3.1
70 (G10)
67.2 ± 5.7
19.8 ± 5.5
13.0 ± 5.6
*Tubules contained 3 germ cells at or beyond the pachytene spermatocyte
stage of development.
3 germ cells at or beyond the pachytene spermatocyte
stage of development.