Why at 12 weeks? A baby isn't viable then. Some women don't even know they're pregnant at 12 weeks.,. B402 has his facts wrong. Roe v Wade is 26 weeks. Wade, 410 U.S. 113 (1973) A person may choose to have an abortion until a fetus becomes viable, based on the right to privacy contained in the Due Process Clause of the Fourteenth Amendment. Viability means the ability to live outside the womb, which usually happens between 24 and 28 weeks after conception. https://supreme.justia.com/cases/federal/us/410/113/#:~:text=Wade%2C%20410%20U.S.%20113%20(1973)&text=A%20person%20may%20choose%20to,and%2028%20weeks%20after%20conception.