In the absence of someone's ability to give consent - ie. Informed consent in medical terms- the responsibility is assumed by the parents or guardian. Since an

In the absence of someone's ability to give consent - ie. Informed consent in medical terms- the responsibility is assumed by the parents or guardian. Since an infant or fetus is unable to provide consent, why would you think a parent is incapable of doing so? This is a baffling line of thought to me.