Final answer:
The normal delivery of a calf involves the head entering the birth canal first. This is known as the vertex presentation or the occiput anterior vertex. It is the most common presentation and is associated with the greatest ease of vaginal birth.
Step-by-step explanation:
The normal delivery of a calf is not rear feet first, but head first. In most births, the fetal head enters the birth canal first and the rest of the body follows. This is known as the vertex presentation or the occiput anterior vertex. It is the most common presentation and is associated with the greatest ease of vaginal birth.