Relatively few craniopagus twins survive the perinatal period; approximately 40 % are born and an additional 33 % die during the neonatal period, usually as a result of congenital abnormalities of other organs.
Relativamente pocos craneópagos sobreviven al periodo perinatal; aproximadamente un 40 % nacen y un 33 % adicional mueren durante el periodo neonatal; usualmente, por anomalías congénitas de otros órganos.