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The aim of this study was to compare the reproductive efficiency in dairy cows with retained placenta (RP), treated with Florfenicol associated or not with Cloprostenol. One hundred and eight cows with RP from dairy herds in southern Minas Gerais state and northern São Paulo state, were included for this purpose. The experiment was designed in factorial 2X2 . The four treatments encompassed two levels of each factor : 1 ) Florfenicol - 4 0mg/kg ( IM) divided in two injections or 40mg / kg ( SC) in one injection after calving; 2) Cloprostenol (0.530mg) - two injections associated with florfenicol treatment or without cloprostenol. The analysis of discrete variables used the Kruskal - Wallis (fou r groups) or Wilcoxon (two groups) statistic to compare groups. The Student "T" test was used to compare means of continuous variables. The overall occurrence of RP was 20.7%. The florfenicol groups had no effects on postpartum uterine health or subsequent reproductive efficiency of the cows. The cloprostenol injections of RP hastened the uterine involution and decreased the occurrence of uterine infection, and increased the percentage of animals with corpus luteum between 25 and 40 days after parturition. The intervals from parturition to first artificial insemination (AI) and to conception, as well as the number of AI per conception were reduced in the cloprostenol treatment

Florfenicol associado ou não ao cloprostenol no tratamento de retenção de placenta em vacas leiteiras