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Treatment of repeat breeders cows with antiseptic solutions alone or associated with progestins

Abstract:

In Maracaibo lake basin, around 20% of crossbred dual purpose cows are considered repeat breeders, having long postpartum intervals and impeding the main farm objective of one calf per cow, per year. The aim of this study was to evaluate the effect of the use of an intrauterine infusion with Listerine® alone or associated with progestins for the treatment of repeat breeder cows. The experiment was conducted in a commercial farm located at Machiques, Perijá county, Zulia state, Venezuela. A total of 85 crossbred repeat breeder cows with more than two failure services (FS) and interval from parturition to treatment (PT) of 186.9 days were included in this study. Cows were allotted into three treatments: Control (T, n=22), without treatment; intrauterine infusion of Listerine® (IL; n=42); intrauterine infusion of Listerine® associated with progestins, (IL+P; n=21). The studied variables were: posttreatment conception rate (TC), treatment-conception interval (ITP), culling rate (TE). The statistical analysis was performed through frequency procedures and chi-square method of SAS. The ITP was analyzed by ANOVA using the GLM (General Linear Model). T, IL, IL+P groups had TCP values of 50, 59.5 and 66.6%, respectively (P > 0.05). The ITP were T = 49.9 ± 9.8 days; IL = 41.0 ± 6.5 days; IL+P = 35.1 ± 8.9 days and the TE showed values of 31.8, 19 y 14.3% for T, IL, IL+P, respectively (P > 0.05). Cows in this work had a calving to conception interval (IPP) of 221.7 ± 75.15 days. Neither IL or IL+P could improve the reproductive efficiency of repeat breeder cows in this experiment.