<qa>  What is the result of intermittent capillary glucose testing?Hypoglycemia is frequent in very low birth weight VLBW neonates and compromises their neurological outcome. The aim of this study was to compare real-time continuous glucose monitoring system RT-CGMS to standard method by intermittent capillary blood glucose testing in detecting and managing hypoglycemia. The investigators calculated a number of 48 neonates to be randomized between 2 ways of glucose level monitoring for their 3 first days of life : either by RT-CGMS CGM-group, or by intermittent capillary glucose testing IGM-group associated with a blind-CGMS to detect retrospectively missed hypoglycemia. The investigators hypothesis is that in the CGM group number and duration of hypoglycemia will be lower. 