Pregnant Wistar rats were housed in individual cages at a constant temperature (22±2°C) with a constant relative humidity (55±10%) on an automatically controlled 12:12 h light-dark cycle (light on at 7:00 a.m.) and had free access to food and water. They were checked regularly for delivery of pups. Two-day-old neonates were treated with STZ dissolved in citrated buffer (pH 4.5) by intraperitoneal injection at the dose of 90 mg kg-1 b.wt. (Goyal et al., 2011). Control neonates were injected intraperitoneally with an equivalent amount of buffer. Three months after the injection, male neonatal STZ-induced rats were selected for the study and the preprandial and postprandial glucose levels of that rats were determined. The animal with the blood glucose levels more than 1.5 fold glucose levels of control rats were considered diabetic