Delayed cord clamping /milking it was prooved in many researches as benificial in terms of : levels of hemoglobin; hematocrit and feritin in the neonats. Also benefits were proved by means of less need for blood tranfusion, less intra ventricular hemorrhage; necrotzing entero colitis and iron deficiency anemia. The hypothesis is that delayed clamping /milking it will increse the level of IgG's in preterm infants. The end point hypothesis is that delayed cord clamping /milking cause to less fever disease or hospitalization it the neonats.