Wm. Ahmed et Si. Shalaby, Temporal relationship between plasma progesterone and oxytocin profiles inrelation to ovarian activity in sheep, I J ANIM SC, 68(11), 1998, pp. 1164-1166
The relationship between progesterone and oxytocin profiles during the oest
rous cycle, early pregnancy, ovarian inactivity and after PGF(2)alpha injec
tion in sheep, was examined. A parallelism between progesterone and oxytoci
n levels during the estrous cycle (r = 0.846, P < 0.1) was observed. Early
pregnant ewes and those having inactive ovaries had significant low oxytoci
n levels. Injection of cloprostenol induced peak levels of oxytocin after 2
hr from injection (r = 0.366, P < 0.05).