Progesterone profiles in postpartum Holstein dairy cows as an aid in the study of retained fetal membranes, pyometra and anestrus [in Canada]

ciclo estral ciclo estrale cycle oestral dairy cows diagnosi diagnosis diagnostic in vivo experimentation oestrous cycle ontario piometra placental retention progesterona progesterone puerperio puerperium pyometra ritenzione della placenta servicios veterinarios servizi veterinari sperimentazione in vivo vacas lecheras vacche lattifere veterinary services