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Sexual activity of Merino ewes during lactation and its interaction with seasonal anoestrus



Sexual activity of Merino ewes during lactation and its interaction with seasonal anoestrus



10th International Congress on Animal Reproduction and Artificial Insemination, June 10-14-1984, University of Illinois at Urbana Champaign, Illinois, USA Volume III Brief communications (Paper 286): 4



30 Merino ewes lambing in Feb. and 32 in Dec. were studied. Each group was divided into subgroups with lambs weaned at 45 and 75 days. The ovarian activity of the ewes lambing in Feb. was found to be at a low level during the spring, and only slightly influenced by different weaning times. In those lambing in Dec., ovarian activity occurred in 59% of ewes in the 1st 45 days, with 12% showing an oestrous cycle immediately after parturition.

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