Kangaroos are marsupials, which are non-eutherian. Humans (and, indeed, most mammals we're familiar with) are eutherians. The birthing process is quite differ

Kangaroos are marsupials, which are non-eutherian. Humans (and, indeed, most mammals we're familiar with) are eutherians. The birthing process is quite different, and so makes for a poor comparison (for one, humans don't have a pouch). A better question would be to compare human pain to other, eutherian animals who do not experience much pain in delivery (see: any nature documentary).