"As we have discussed at length above, a woman who has a child is subject to a whole range of de jure and de facto punishments, disabilities and limitations to her freedom from the earliest stages of pregnancy. In the most obvious sense she alone must bear the pains and hazards of pregnancy and childbirth. She may be suspended or expelled from school and thus robbed of her opportunity for education and self-development. She may be fired or suspended from her employment and thereby denied the right to earn a living and, if single and without independent income, forced into the degrading position of living on welfare.... If a woman is unmarried, unless she succeeds in obtaining an abortion, she has no choice but to bear the child, while the man who shares responsibility for her pregnancy can, and often does, just walk away.... Having been forced to give birth to a child she did not want, a woman may be subject to criminal sanctions for child neglect if she does not care for the child to the satisfaction of the state...."