Tehran University of Medical Sciences Journal of Family and Reproductive Health 1735-8949 8 2 2014 06 15 77 81 Fatemeh Davari-Tanha Department of Obstetrics and Gynecology, Women Hospital, Tehran University of Medical Sciences, Tehran, Iran. Mahbod Kaveh Department of Neonatology, Bahrami Hospital, Tehran University of Medical Sciences, Tehran, Iran. Somayeh Nemati School of Medicine, Tehran University of Medical Sciences, Tehran, Iran. Pouya Javadian School of Medicine, Tehran University of Medical Sciences, Tehran, Iran. Bahram Salmanian School of Medicine, Tehran University of Medical Sciences, Tehran, Iran. 2015 10 16 Objective: Elevated nucleated red blood cell (NRBC) count is introduced as a potential marker of intra-uterine growth restriction (IUGR). To investigate the probable association regardless of any known underlying disease, we aimed to study disturbances in NRBC count in infants experiencing idiopathic IUGR. Materials and methods: Twenty three infants regarded IUGR without any known cause were chosen to be compared to 48 normal neonates. Blood samples were collected instantly after birth and the same measurements were done in both groups. Results: NRBC count/100 white blood cells was significantly higher in the IUGR group (P value < 0.001). pH measurements did not reveal any significant difference. Conclusion: Increased NRBC count in cases of idiopathic IUGR in absence of chronic hypoxia could strengthen its predictive value suggested in previous studies. It could help early IUGR detection and beneficial intervention. https://jfrh.tums.ac.ir/index.php/jfrh/article/view/220 https://jfrh.tums.ac.ir/index.php/jfrh/article/download/220/215