A procedure was developed to rank AI sires on utility. The utility function considered transmitting abilities for production, udder depth, teat placement; and foot angle, semen cost, timing of costs and revenues, gene flow, and risk. Weights for type traits relative to production and risk aversion were based on the literature. A three-generation planning horizon was used. Utility was expressed ...

Good management of the pregnant heifer is crucial to ensure that she is well grown and healthy and calves down easily before joining the milking herd. This study collected primary data on all aspects of heifer management on 101 UK farms during heifer pregnancy from conception to calving including farm factors and associated costs of system inputs. A cost analysis workbook was developed to calcu...

Introduction: Drug addiction causes many complications for mother and fetus. Iran statistics on drug addicted pregnant women to 2.2 percent. Given the negative consequences of drug use can have on growth fetal growth, birth. This study aims to investigate the growth process of birth is done in the first 6 months of life. Methods: The study is a Cross-Sectional study was done on 40 pregnant wom...

The objective of this study was to assess the quality of genomic predictions for rebreeding success or failure after calving, age at first calving, and early pregnancy occurrence in Nellore females. There were 1,853 individuals that had 305,348 SNPs each used in genomic selection analyses. Three genomic prediction methods were used: GBLUP, a Bayesian method (BAYESCπ), and a lasso method (IBLASS...

The search for ways to select for improved beef cow efficiency has become the holy grail of the beef cattle seedstock industry. Increases in beef production have often been possible due to enhancements in the reproduction indexes (e.g. calving frequency, age at first calving, calving interval), nutrition concepts (e.g. strategic supplementation, type of forage as well as quantity and quality), ...