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. 2014 Nov;27(11):1554–1561. doi: 10.5713/ajas.2014.14139

Table 2.

Correlation coefficients for association of testosterone concentrations with testicular cell number and indices in crossbred bulls of different age groups

Testicular cells and indices Testosterone concentration (ng/mL)

Bull calves (6 months; n = 5) Young bulls (15 months; n = 5) Adult bulls (4 to 6 years; n = 8)
Spermatogonia −0.146 0.028 −0.182
Primary spermatocytes 0.719* 0.006 0.193
Early spermatids −0.679 −0.014 0.110
Late spermatids −0.062 −0.018 0.108
Spermatozoa - −0.069 0.135
Sertoli cells 0.269 0.019 −0.072
Spermatic index - −0.070 −0.071
Sertoli cell index 0.258 0.016 −0.053
Sperm:Sertoli cell ratio - −0.064 0.008
Spermatogenic:Sertoli cell ratio −0.371* −0.006 0.134
Sertoli cells/100 germ cells 0.258 −0.713* −0.056
*

Indicates significant relationship between a pair of variables (p<0.001).