en Neonatal Neonatal Letter to Editor Letter to Editor This is a letter to editor in responce to review article entitled " Low birth weight in Iran: Implications from a systematic review of the literature and meta-analysis in the period 1999-2017" by Ebadi et al. published in the Medical Journal of the Islamic Republic of Iran (2018; 32 (1): 68-77). Low birth weight, Iran 181 182 http://mjiri.iums.ac.ir/browse.php?a_code=A-10-4689-1&slc_lang=en&sid=1 Narjes Khalili narjes.1357@yahoo.com 200319475328460062769 200319475328460062769 No Preventive Medicine and Public Health Research Center, Department of Community Medicine, School of Medicine, Iran University of Medical Sciences, Tehran, Iran Maziar Moradi-Lakeh moradilakeh.m@iums.ac.ir 200319475328460062770 200319475328460062770 Yes Preventive Medicine and Public Health Research Center, Department of Community Medicine, School of Medicine, Iran University of Medical Sciences, Tehran, Iran Mohammad Heidarzadeh heidarzadeh_2013@yahoo.com 200319475328460062771 200319475328460062771 No Tabriz University of Medical Sciences, Tabriz, Iran