[Progesterone secretion during male-induced cycle in the Creole goat in anestrus: seasonal effects].
Plasma progesterone levels during male-induced ovarian cycles were measured at three periods (March, July, November) in Creole goats. For the females experiencing a cycle of normal duration, plasma progesterone reached 2.0 ng/ml six days after male introduction. For the females experiencing a short cycle, a brief (one day) and slight (0.5 to 1.0 ng/ml) secretion of progesterone was observed during this cycle. A seasonal variation in the interval between male introduction and maximum level of progesterone during the short cycle was demonstrated (March: 4.7 days; July: 5.6 d. and November: 3.1 d.), but the maximum level reached did not vary with season (0.6; 0.9 and 0.6 ng/ml).
D000818:Animals; D004971:Estrus; D005260:Female; D006041:Goats / Q000502:physiology*; D011247:Pregnancy; D011374:Progesterone / Q000097:blood*; D012621:Seasons; D013997:Time Factors
D011374:Progesterone
Sécrétion de progestérone au cours du cycle induit par l'introduction du mâle chez la chèvre créole en anoestrus: effets de la saison.