Inclusion Criteria:  All children less than 24 months of age scheduled for conventional inpatient surgery will be included  Exclusion Criteria:  Children receiving intravenous fluids during the fasting period children managed in ambulatory surgery children with an ASA score strictly greater than 3 children managed in the emergency operating room children with an acute metabolic disorder an endocrine pathology or a pathology requiring the chronic use of drugs modifying glycemia (insulin, oral antidiabetics, glucagon, gabapentin, antidepressants and neuroleptics, conversion enzyme inhibitors (CEI) beta blockers, statins, anti-transplant treatments, corticoids, antimalarial drugs, the following antibiotics fluoroquinolones, doxycycline, sulfamethoxazole, trimethoprim)