title: Sexual activity of Assaf ewes after October and February lambings.
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.
authors.affiliation: Agricultural Research Organization, The Volcani Center, P.O.B. 6, Bet Dagan 50250, Israel.
authors.forename: D
authors.initials: D
authors.lastname: Amir
authors.forename: H
authors.initials: H
authors.lastname: Gacitua