"Appellants contend that fundamental rights entitled to constitutional protection are involved in the instant case, namely the right of individuals to seek and receive health care unhindered by arbitrary state restraint; the right of married couples and of women to privacy and autonomy in the control of reproduction; and the right of physicians to practice medicine according to the highest professional standards. These asserted rights meet constitutional standards arising from several sources and expressed in decisions of this Court. The Texas abortion law infringes these rights, and since the law is not supported by a compelling justification, it is therefore unconstitutional."