background: although many efforts made for the advancement of medical science, it is distributed inequitably despite of all existing financial and human resources facilities. children as the most important and vulnerable groups of society are influenced by these inequities. the objective of this study is comparison of children health indices in rich and poor rural zones in mashhad/iran. methods...

A national fertility evaluation was developed based on pregnancy rate, which measures the percentage of nonpregnant cows becoming pregnant within each 21-d opportunity period. Data for evaluation are days open, which are calculated as date pregnant minus previous calving date. Date pregnant is determined from last reported breeding or from subsequent calving minus expected gestation length. Suc...