Özet:

Purpose: This study aims to investigate the birth weight, milk cut weight and daily living weight increase, the effect of birth medicine, gender and maternal age, metanalysis Method and Method: The study used 51 research results from articles published between 1990-2011, which correspond to the determined criteria. As the meta analysis and the estimates of the impact sizes based on the average of each study are calculated and the heterogenity between the studies is important (P<0.05), the random impact model has been used in the combination of the impact sizes for all factors affecting the growth characteristics. No assessment was made because the relevant and sufficient data of the main age factor was not found. Results: The size of the influence of the gender was calculated for 0.39 for birth weight; 0.47 for milk cut weight and 0.62 for daily living weight increase, and both three values were statistically significant (P<0.001). The gender factor has been influenced by the birth weight, the weight of the milk cut and the daily living weight increase. The effect size of the birth type was calculated as 1.14 for the birth weight; 0.76 for the cut weight and 0.47 for the daily living weight increase (P<0.001) and significant. Recommendation: As a result, according to the meta analysis conducted in the study, the birth weight of cows, the weight of cutting from milk and the daily living weight increase, the birth medicine and gender factors have been found to be effective.

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