The effect of testosterone on serum gonadotropins of castrated rats kept under different lighting conditions.

@article{PorkkaHeiskanen1992TheEO,
  title={The effect of testosterone on serum gonadotropins of castrated rats kept under different lighting conditions.},
  author={Tarja Porkka-Heiskanen and M. L. Laakso and D. E. Stenberg},
  journal={Biology of reproduction},
  year={1992},
  volume={46 6},
  pages={1127-9}
}
Testosterone feedback sensitivity was measured as the ability of testosterone propionate to decrease serum LH and FSH of long-term castrated (4 wk) rats under four different lighting conditions: periodic light (12L:12D), constant light (LL), constant darkness (DD), and dim night illumination (1 lx) with a 12L:12D photoperiod. Rats were exposed to the different lighting conditions for 1 wk, during which they received daily testosterone propionate (125 micrograms or 250 micrograms s.c.). At the… CONTINUE READING

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