Panorama has been given exclusive access to the largest ever study of so-called "miracle babies". Babies born at less than 26 weeks gestation, who owe their lives entirely to modern medicine. The findings of the study raise complex questions about the purpose of neonatal intensive care and the sanctity of life. Has the time come for doctors to stop their heroic attempts to save the smallest babies, in order to concentrate on those more likely to survive "intract:.