Missouri senators have endorsed legislation that would require a woman wait 72 hours after first seeing a doctor before having an abortion.
Senators approved the legislation 22-9 early Tuesday morning, sending it back to the House. Lawmakers have until 6 p.m. on Friday to pass new legislation.
The measure would triple Missouri's current one-day waiting period. Utah and South Dakota also require a three-day wait.
Supporters of the legislation say the longer waiting period would offer women more time to think about the possible consequences of having an abortion.
Critics say it would push a woman further into pregnancy before the procedure, which can increase risk.