The present disclosure provides compositions and methods for improving reproductive health of mammals and increasing milk production from female mammals. The methods involve administering an effective amount of IL 8 to a female mammal such that the reproductive health of the mammal is improved or milk production from the mammal is increased or the fat content of the milk is increased. In another aspect the disclosure includes prophylaxis and/or therapy of uterine conditions by administering IL 8 to a female mammal.
