Veterinary MedicineAnimal SciencesVeterinary PhysiologyLivestock ProductionReproductive PhysiologyRuminant NutritionSheep PhysiologySheep ReproductionEwe Reproductive PhysiologyOvulation PhysiologyOvulation Rate
The relationship between bodyweight at the time of ovulation and ovulation rate has been investigated using 715 observations on mature Merino ewes. Below 35-37.5 kg, ovulation rate was approximately lOSc/;, and varied little with bodyweight. Above this level, for each weight increase of 2.5 kg there was at least a 5% increase in ovulation rate up to 53.5 kg, and at least a 10% increase per 2.5 kg within the range 40.4-48.4 kg.