"Let us restate the main constitutional rulings and principles of the German and American abortion cases. The American case holds that the right to privacy, founded upon the Fourteenth Amendment's concept of personal liberty, is broad enough to encompass a woman's decision whether or not to terminate her pregnancy. A zone of privacy is created within which the decision to procure an abortion is exclusively that of the pregnant woman and her physician. Accordingly, the state has no legitimate interest whatever in preventing abortions from occurring within the first trimester of pregnancy. Its only interest is seeing to it that abortions are performed under circumstances that insure adequate surgical procedures and care for patients. Yet the right to procure an abortion is not absolute, and so, following the first trimester of pregnancy, the state may begin to assert important interests in maintaining medical standards. It may assert these interests because an abortion performed in the second trimester is a greater medical risk than one performed in the first trimester. It is only in the last trimester, when the fetus becomes viable and potentially able to survive outside of the womb, that the state may promote its interest in protecting future life, but even during this period the unborn child may be destroyed, medical standards permitting, to preserve the life or health of the mother. What we have here is a constitutional policy on abortion based on the Court's conclusion that a fetus or unborn child is not a "person" within the meaning of the Fourteenth Amendment."