An evaluation of simultaneous GnRH and cloprostenol treatment of dairy cattle with cystic ovaries.

摘要: In a randomized double-blind clinical trial, 75 cows with ovarian cysts were treated the synthetic gonadotropin releasing hormone, gonadorelin acetate (GnRH). Forty-two of these simultaneously cloprostenol (CP), and remaining 33 received sterile saline. Milk progesterone (P4) was measured at treatment two days later. Clinical response 30 after determined by palpation per rectum, estrus breeding dates recorded up to 90 treatment. Cows examined for pregnancy rectum 40 or more breeding. levels significantly lower 30-day rate higher in GnRH + CP group than group. Intervals first conception, proportion heat day 21 treatment, did not differ between groups. The same relationships held subset P4≥1 ng/mL Fewer became pregnant but this difference significant. These results suggest that simultaneous all cystic ovaries cannot be recommended time.