The aim of this study was to compare fertility of cloprostenol-induced oestrus to that of spontaneous oestrus in dairy cows.
In a group of 525 cows, 280 (treated group) were administered 0.5 mg cloprostenol i.m. after transrectal corpus luteum (CL) detection, and inseminated at detected oestrus during the following week.
The other 245 cows (control group) were inseminated during spontaneous oestrus. Whey progesterone concentrations were checked at treatment and at insemination in order to remove from the study cows whose P4 levels indicate a non-functional CL, or a lack of luteolysis respectively.
Moreover, cows that were not inseminated due to genital problems were also excluded from this study.
Conception (59% vs 54.5%) and calving rates (93.7% vs 93%) were not significantly different between the two groups.
Source: Cairoli, F, Mollo, A, Veronesi, MC, Renaville, B, Faustini, M & Battocchio, M (2006): Comparison between Cloprostenol-induced and Spontaneous Oestrus Fertility in Dairy Cows. In:
Reproduction in Domestic Animals 41 (2), 175-179.
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