IRCT201604041788N16 IRCT 2016-09-12 Vice chancellor for research, Iran University of Medical Sciences The influence of being in facilitated tucking on heel stick pain The effect of facilitated tucking on heel stick pain in preterm infants 2016-03-04 anticipated 40 Complete https://irct.ir/trial/1374 interventional Randomization: Randomized, Blinding: Not blinded, Placebo: Not used, Assignment: Crossover, Purpose: Supportive, Other design features: Randomized blocking method. 2 Heel pain during blood sampling. Intervention 1: Intervention group 1: two minutes before blood sampling, the newborn will be assessed by Premature Infant Pain Profile (PIPP). Then the newborn will be put in facilitated tucking position by the nurse, and this will be continued until 3 minutes after blood sampling. Assessment with PIPP will be done again, during and 3 minutes after blood sampling. For second time, the blood sampling will be done in routine position and PIPP will be measured before and after that. Intervention 2: Intervention group 2: at the first time the process will be done in routine position and Premature Infant Pain Profile (PIPP) will be measured before and after the procedure. In the second time, two minutes before blood sampling, the newborn will be assessed by PIPP. Then the newborn will be put in facilitated tucking position by the nurse, and this will be continued until 3 minutes after blood sampling. Assessment with PIPP will be done again, during and 3 minutes after blood sampling.