I can't see how it possibly meets "first do no harm" criteria when routinely performed on newborn boys rather than by medical necessity.
Parents do not own their children. If you have the right to mutilate your newborn boy like he's personal property, rather than a separate and unique individual human being, you have a right to kill it in the womb.
Oh stop the silly strawman nonsense. They own responsibility for their children, their child's health and well being. As for “genital mutilation” the claim is utterly unsupportable as regards the male. Moreover circumcision facilitates cleanliness.