Pro-life advocates were dealt a hard blow last night after Bible Belt voters in Mississippi defeated the so-called “personhood” initiative. But abortion opponents appear undeterred, saying that they’re still pursuing life-at-fertilization ballot initiatives in six other states following the major loss.

While aired prior to yesterday’s polling results, the following NBC video provides an overview of the initiative and the intense debate surrounding it:

The “personhood” proposal was intended to prompt a legal challenge aimed at overturning Roe v. Wade, the 1973 U.S. Supreme Court decision that established a legal right to abortion.

Keith Mason is co-founder of Personhood USA, which pushed the Mississippi measure. The Colorado-based group is trying to put initiatives on 2012 ballots in Florida, Montana, Ohio, Oregon, Nevada and California. Voters in Colorado rejected similar proposals in 2008 and 2010.

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