The use of cloprostenol to reduce the diestral phase of the sexual cycle of mares

The article presents the results of analysis pregnancy rates mares depending on duration intervals from cloprostenol preparation injection to ovulation. It was found that with a decrease in interval (≤7 days), rate decreases by 30% (p≤0.05). To determine optimal time for use, an ovulation performed, day sexual cycle and largest follicle diameter. average before groups, (5, 6-7, 8-10, 11-15 have 8.5±0.4 11.1±0.5 days. However, it is difficult predict ovulation, since treatment varies greatly, difference extreme values groups can be 8 13 More precisely, possible until reaches 35 mm known diameter at injection. In this way, group ≤22 mm, 7.13±0.17 days, 23 26 - 4.59±0.16 27 30 2.91±0.13 these more significant – 5 11 days depends individual mare estrus.