INS and endometritis: In normal and subclinical endometritis cows, the insulin concentrations started to increase around 4 weeks, peaked at 5 weeks postpartum and decreased abruptly during 6 and 7 weeks postpartum, even though the change in insulin concentrations in clinical endometritis followed similar pattern as in normal and subclinical endometritis cows the concentration was lower than the normal and subclinical endometritis cows.