What is the time limit on abortion in the US?

Under Roe, states have the authority to regulate abortion after viability, which is generally considered to be between 24 to 28 weeks after a patient’s last menstrual period.

At what week is abortion illegal in the US?

As of May 14, 2019, the state prohibited abortions after the fetus was viable, generally some point between week 24 and 28. This period uses a standard defined by the US Supreme Court in 1973 with the Roe v. Wade ruling.