Abstract: Lavage apparatus comprises lavage fluid supply apparatus, a first catheter having a distal end for positioning in the uterus of an animal and a proximal end for communication with the lavage fluid supply, a pair of bilateral catheters connected to the proximal end of the first catheter for extending into respective horns of the uterus, and catheter locating means for locating the catheters in the uterus. The first catheter defines respective supply and drain lumens. The bilateral catheters each define respective lumens for fluid communication between the supply lumen and the interior of the respective uterine horn. The lavage fluid supply apparatus may include a pump for supplying lavage fluid under pressure. The supply may also include a lavage fluid storage tank for containing a volume of fluid, and a heater to maintain the temperature of the stored fluid within a predetermined range.