Table 2.
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).