Figure 1

Arterial cannulation in bovine foetuses. Bovine fetal hind limb was identified by intra-abdominal palpation and moved so that the foot lay in the maternal abdominal incision (A). After an incision through the uterine wall and after opening of the fetal membranes, they were progressively fixed together by Collins forceps. The fetal limb was withdrawn from the uterus until the anterior surface of the hock joint was easily accessible (B). The fetal medial tarsal artery was exteriorized and catheterized with a polyvinyl catheter (C).