"Proponents of abortion-on-demand assert that anti-abortion laws unlawfully intrude into the privacy of the physician-patient relationship. They assume necessarily that the doctor treating a pregnancy owes an obligation of good medical care to only one patient, the pregnant woman.... As a patient of the obstetrician, the child may recover damages for a prenatal injury suffered as the result of the negligence of his doctor. It is elemental that a doctor cannot be freed from legal restraints in making socio-moral judgments. The state may regulate the medical profession to protect the health and welfare of all its citizens. Appellants’ contentions of intrusion upon physician-patient relationship are not self-sustaining and must be associated with and connected to a violation of some basic right."