en تخصصي Special پژوهشي Research <div style="text-align: justify;"><span style="font-family:Times New Roman;"><span style="font-size:14px;"><span style="color:#336666;"><strong>Background and Objective:</strong></span> Fetal macrosomia increases the risk of perinatal mortality and morbidity. The aim of this study was to determine the prevalence of macrosomia and its relationship with related factors in neonates born in the hospitals affiliated to Mashhad University of Medical Sciences.<br> <span style="color:#336666;"><strong>Methods:</strong></span> This cross-sectional study was performed on 97569 neonates using the data obtained from the neonates&#39; screening program in Mashhad. Their information was extracted from Sina electronics system (electronic medical records software) and analyzed using SPSS 16. The prevalence of macrosomia and its related factors are revealed by tables.<br> <span style="color:#336666;"><strong>Findings:</strong></span> In this study, the prevalence of macrosomia was estimated at 6.6 % which was higher in male neonates than females. The mean birth weight was higher in male infants than female ones. It occurred 8.25 times higher in singletons than multiplets. The prevalence of macrosomia was increased by maternal age (P=0.001). Most of the neonates were born by cesarean section, and in most of them, the parents were not relatives. The prevalence of macrosomia gradually increased in parents living in densely populated cities and its trend gently decreased from the beginning to the end of the year.<br> <span style="color:#336666;"><strong>Conclusion:</strong> </span>The prevalence of macrosomia in infants in Mashhad was 6.6% and was correlated with maternal age during pregnancy, infant&#39;s gender, number of fetuses, mode of delivery, parental consanguinity, parental residence places and birth season.</span></span></div> Macrosomia, Neonates, Related Factors 516 522 http://caspianjp.ir/browse.php?a_code=A-10-131-1&slc_lang=en&sid=1 Abdolhossein Karazhian karazhianab941@mums.ac.ir 10031947532846002805 10031947532846002805 No Assistant of Family Medicine, Department of Family Medicine, Mashhad University of Medical Sciences, Iran Mohammad Reza Majdi majdimr@mums.ac.ir 10031947532846002806 10031947532846002806 Yes Associate Professor of Pediatrics, Department of Family Medicine, Mashhad University of Medical Sciences, Iran Ali Taghipour TAGHIPOURA@mums.ac.ir 10031947532846002807 10031947532846002807 No Associate Professor in Epidemiology, Department of Epidemiology & Biostatistics, School of Health, Social Determinants of Health Research Center, Mashhad University of Medical Sciences, Mashhad, Iran Hamid Reza Bahrami BAHRAMIHR@mums.ac.ir 10031947532846002808 10031947532846002808 No Associate Professor of Complementary and Chinese Medicine, School of Persian and Complementary Medicine, Mashhad University of Medical Sciences, Iran Seyed Kazem Farahmand FARAHMANDK1@mums.ac.ir 10031947532846002809 10031947532846002809 No Associate Professor of Complementary and Chinese Medicine, School of Persian and Complementary Medicine, Mashhad University of Medical Sciences, Iran Ehsan Mosa Farkhany FARKHANYE1@mums.ac.ir 10031947532846002810 10031947532846002810 No Ph.D. Candidate of Epidemiology, Vice Chancellery of Health, Mashhad University of Medical Sciences, Iran Hassan Khani Iurigh DR.H.KHANI@gmail.com 10031947532846002811 10031947532846002811 No Family Medicine, Ghaemshahr Health Center, Mazandaran University of Medical Sciences, Sari, Iran