GOP presidential candidate Newt Gingrich (Pic by Gage Skidmore, via Wikimedia Commons ) Republican presidential favorite Newt Gingrich has pledged his support for the controversial anti-abortion movement known as “fetal personhood,” by signing a pledge that has yet to be signed by opponent Mitt Romney. Personhood USA, the group behind “fetal personhood” petitions that have appeared in states across the country, announced yesterday that Gingrich had signed its pledge . In doing so, he opposes ”assisted suicide, euthanasia, embryonic stem cell research, and procedures that intentionally destroy developing human beings” and agrees to “work to advance state and federal laws and amendments that recognize the unalienable right to life of all human beings as persons at every stage of development.” “To the best of my knowledge, I will only appoint federal judges and relevant officials who will uphold and enforce state and federal laws recognizing that all human beings at every stage of development are persons with the unalienable right to life,” Gingrich pledged