The objective of this study was to analyze the effects of non-genetic factors affecting calving difficulty in the Holstein population of the Czech Republic for subsequent compilation of the model for genetic evaluation as well as for herd management practice. Calving difficulty recorded in 1997-2006 was assessed in three categories: 1 = normal. 2 = hard pull. 3 = complicated. https://www.jmannino.com/best-buy-AniFlex-Complete-great-choice/