Prediction of the ovulation time in estrus mares by different methods

The study aimed to evaluate the prediction of ovulation time by three different methods body temperature, Dramineski estrus detection apparatus, and observation of the mature follicle daily by ultrasonography in mare’s estrus. Sixteen mature cycling mares were used during the breeding season in15 March and15 June of 2021, aged 5-6 years old, at the Nineveh Equestrian club in Mosul city, Iraq. Mares were examined daily by rectal palpation and ultrasound with a 5.5-7 MHz linear-array transducer probe to scan the ovaries and uterus. The mare's follicle diameter and body temperature were recorded daily in the Dramineski estrus detection apparatus to predict ovulation when the data was up to 400 degrees. The result showed that the body temperature was increased significantly from the 1st day to the third day of estrus at P