1 in 200,000 "Conjoined Twins" 1 in 200,000 eMedicine - Conjoined Twins 1 in 200,000 1/ 33,000-165,000 births 0.0005 percent of all live births 1/ 33,000-165,000 births 1/ 33,000-165,000 births 0.0005 percent of all live births Conjoined Twins: eMedicine Pediatrics: Surgery "Conjoined Twins" 1/ 33,000-165,000 births conjoined twins "Conjoined Twins" 1 in 200,000 0.0005 percent of all live births 1/ 33,000-165,000 births 0.0005 percent of all live births 1 in 200,000 Conjoined Twins: eMedicine Pediatrics: Surgery Conjoined twins