[Nonsteroid regulators of ovarian cycles. I. 1, 2-bis-(thiocarbamoyl) hydrazines]. / Nesteroidní regulátory ovariálních cyklu. I 1, 2-bis-(thiokarbamyly) hydraziny

PIP: 24 New 1,2-bis-(thiocarbamoyl)hydrazines were administered (60 mg/kg of feed) to hens in their laying period. Egg-laying was followed before, during, and after the 21-day administration. In the group of N-(allylthiocarbamoyl)hydrazines the biological activity regularly increased, a further increase being achieved by incorporating oxygen into the nitrogen heterocycle. The incorporation of sulphur caused a strong decrease in the inhibitory activity.^ieng