Rhythm of sexual cycles of cows and level of the hidden early embrionic mortality
Results of a monitoring research of rhythm of sexual cycles of cows between repeated inseminations are presented. It is authentically established that in the conditions of loose housing keeping of cows the unevenness of a sexual cycles of cows after the inseminations which did not end with stylishness is considerably widespread in the production lactic complex (by results of ultrasonography in 35-45 days). At the same time the significant influence of seasonal and fodder factors is noted: duration of intervals between inseminations averaged 70.41 days in the winter, and in the summer of 38.54 days, respectively, that demonstrated presence of the hidden early embryonic mortality at cows. Only in 7.58 and 22.70% (winter-summer) of observations the interval between repeated inseminations within specific physiological norm was established, the shortened cycles fixed at 3.03-10.75% of cows, extended - at 89.39-65.95%, respectively. The analysis of a complex ethological and the morph functional of indexes of dairy herd authentically revealed a critical interval of the hidden fetal mortality of the period between implantation of a nucleus and formation of fruit envelopes (40-63 days between repeated inseminations). Ultrasonography by scanning at cows it is not established inflammatory processes in a cavity of the uterus, but 73% of cases degenerately - dystrophic damages of ovaries are diagnosed that shows need of use gisto- and cytological methods of researches for studying of possible destructive processes in structure of the cells and fabrics of a reproductive path.