Seasonal variability of reproductive function of cows

Abstract

Seasonal variability of reproductive function of cows The purpose. To study physiological state of cows of dairy breeds in the course of the year and to compare methods of correction of contractibility of an uterus. Methods. Physiological state of cows was determined by rectal researches. They applied medicamentous means at atonia of uterus at cows. Results. For the first time the complex comparison of efficiency of application of preparations-uterotonics of several pharmacological groups for treatment of atonia of uterus at cows is made. It is fixed that the share of pregnant cows increases from 28-32 % in the winter, in the spring and in the summer up to 63% in the autumn. The percentage of cows with atonia of uterus is simultaneously decreases (from 16% in the winter to 4% in the autumn). After their treatment with Oxytocinum and Docitolum 53 – 57% of cows have recovered within a month. More efficient was application of Neostigmine methylsulfate, Oestoformum and Galapanum. Conclusions. The gained results should be considered at mapping out treatment-and-prophylactic provisions, holding stimulation and synchronization of a hunt.