Lt. Gov. David Dewhurst made the decision Tuesday night after determining that Democratic Sen. Wendy Davis strayed off the topic.

Democrats immediately appealed the decision and set off a heated debate about the rules and whether they could vote on the bill.

Wearing pink tennis shoes to prepare for nearly 13 consecutive hours of standing, a Democrat Wendy Davis began a one-woman filibuster to block a GOP-led effort that would impose stringent new abortion restrictions across the nation's second-most populous state.

Davis, 50, of Fort Worth began the filibuster at 11:18 a.m. CDT Tuesday .

Before Davis began speaking, her chair was removed. CBSDFW.com reports that Davis must speak continuously -- and stay on topic -- the entire time. She is not allowed to lean against something for support. And she will not be able to stop or take a break, not even for meals or the restroom, during the entire 13-hour ordeal.

If signed into law, the measures would close almost every abortion clinic in Texas, a state 773 miles wide and 790 miles long with 26 million people. A woman living along the Mexico border or in West Texas would have to drive hundreds of miles to obtain an abortion if the law passes.