Expulsion of the fetal membranes (placenta) and involution of the uterus (getting ready for the next pregnancy) comprise the third stage of labor. The placenta is usually expelled within a few hours of birth but complete involution of the uterus takes up to 40 days after calving.
Farmers give cows the Gallic Post Calving Bolus orally (by mouth), once the cow has calved.
