Co-Authors:
Amir, D., Agricultural Research Organization, The Volcani Center, P.O.B. 6, Bet Dagan, 50250, Israel
Gacitua, H., Agricultural Research Organization, The Volcani Center, P.O.B. 6, Bet Dagan, 50250, Israel
Abstract:
The first ovulation in 20 Assaf ewes and the first estrus in 54 out of 77 Assaf ewes after the October lambings occurred at mean intervals of 26 ± 1.7 and 50 ± 1.5 d postpartum, respectively. After the February lambings, nine out of 20 examined ewes had their first ovulation and estrus 35 ± 2.5 and 71 ± 7.7 d postpartum, respectively, and resumed normal cyclic activity in April. Five animals showed considerable ovarian activity but only occasional estrous activity during spring, while the remaining six ewes had a 6-to 7-mo-long anestrous season during which only occasional ovulations were detected in three of them. © 1987.
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