The purpose of this study was to evaluate nutritional status in Isfahan dairy herds and the relationship between milk urea nitrogen (MUN) and fertility in the first postpartum insemination. Blood and milk samples were collected from 170 and 290 Holstein cows from 9 dairy herds. respectively. Feed samples were also collected to quantify the relationship between MUN and protein and ener... https://yeswellneses.shop/product-category/sinus-allergy/