The Missouri State Senate has passed a bill to extend the waiting period for an abortion from 24 to 72 hours. The bill passed early Tuesday morning despite a filibuster by State Senator Scott Sifton. Protesters have gathered outside the Missouri State Capitol to launch a “women’s filibuster” against the bill, which they call a threat to women’s health. They have stayed overnight for two nights and are vowing to remain for 72 hours, until Thursday afternoon. The bill now heads back to the Missouri House, which has already passed a similar bill. If it’s enacted, Missouri would become the third state with a three-day waiting period, along with Utah and South Dakota.