Influence of age and testosterone levels on masculine development in rams.

@article{Field1989InfluenceOA,
  title={Influence of age and testosterone levels on masculine development in rams.},
  author={Robert M. Field and L D Ho and W. C. Russell and Michelle L Riley and W. James Murdoch and Edward Alva Van Kirk and S. K. Ercanbrack and Frank L’Engle Williams},
  journal={Journal of animal science},
  year={1989},
  volume={67 11},
  pages={2943-9}
}
Fifty wethers and 51 spring-born rams were divided into five groups and slaughtered at different seasons of the year at average ages of 271, 361, 459, 557 or 652 d to determine the age and season at which differences in secondary sex characteristics could be detected. Serum testosterone concentrations and testes weights were low in January when the rams were 271 d of age and again in April at 361 d of age. By July, at 459 d of age, testosterone concentrations and testes weights had peaked and… CONTINUE READING