[Happy Monkey]

Except the parenting technique is only roughly the same. The first child is parented very differently from the 16th. My mom is the oldest of a large number of siblings, and she ended up doing a lot of the parenting for some of her siblings, while she obviously had no older siblings to help raise her. And when she went off to college, a different sibling became the oldest, so the parenting style changed again. In addition to that, the parents will certainly have changed their methods to some extent over the years, whether from learning what works, or just getting tired.