"When pregnancy begins, a woman is faced with a governmental mandate compelling her to serve as an incubator for months and then as an ostensibly willing mother for up to twenty or more years. She must often forego further education or a career and often must endure economic and social hardships. Under the present law of Texas she is given no other choice. Continued pregnancy is compulsory, unless she can persuade the authorities that she is potentially suicidal or that her life is otherwise endangered. The law impinges severely upon her dignity, her life plan and often her marital relationship. The Texas abortion law constitutes an invasion of her privacy with irreparable consequences. Absent the right to remedy contraceptive failure, other rights of personal and marital privacy are largely diluted."