en Midwifery Review Articels <p><span style="line-height:2;"><span style="font-size:14px;"><span style="font-family:Times New Roman;"><span style="unicode-bidi:embed"><span sans-serif=""><span style="color:#2980b9;"><b><i><span new="" roman="" times="">Background:</span></i></b></span><span style="color:#f39c12;"> </span><span new="" roman="" times="">Gestational diabetes mellitus (GDM) is the most common complication of pregnancy and an important public health concern. Several studies have investigated the prevalence of gestational diabetes in different parts of Iran with different results</span><span new="" roman="" times="">. </span></span></span><br> <span style="unicode-bidi:embed"><span sans-serif=""><b><i><span new="" roman="" times=""><span style="color:#2980b9;">Objectives:</span> </span></i></b><span new="" roman="" times="">The present study aimed to review studies on gestational diabetes prevalence and estimate the prevalence of gestational diabetes in Iran.</span></span></span><br> <span new="" roman="" times=""><span style="color:#2980b9;"><b><i>Methods:</i></b></span><span style="color:black"> A search on gestational diabetes mellitus and related synonyms was conducted using global and national databases, including PubMed, Science Direct, Scopus, Web of Sciences, Google Scholar, SID, IranMedex, Magiran, Irandoc, and Medlib. Moreover, gray literature, reference checks, and a library search were conducted. Keywords included: prevalence, Iran, gestational diabetes mellitus (GDM), and their synonyms. The inclusion criteria were observational studies (cross-sectional, prospective cohorts, and retrospective cohorts) published in Persian or English between 2000 and 2020 on the prevalence or incidence of gestational diabetes in Iran, a sample size of more than 100 people, and availability of full texts. The selected articles were thoroughly reviewed, and after quality assessment, the required information was extracted and included in the meta-analysis.</span></span><br> <span style="unicode-bidi:embed"><span sans-serif=""><span style="color:#2980b9;"><em><b><span new="" roman="" times="">Results:</span></b></em></span><span new="" roman="" times=""> From 907 articles, 48 were included in the meta-analysis according to the inclusion criteria, which included 51,259 patients with an average age (standard deviation) of 27.05 years (1.83). The overall prevalence of GDM in Iran was 10% (11,9: 95% confidence interval). The prevalence of GDM had increased in recent years, from 4% before 2005 to 16% in 2016 to 2020 (20,12: 95% CI). There was significant heterogeneity between studies, and the I-square index was 98%.</span></span></span><br> <span style="unicode-bidi:embed"><span sans-serif=""><span style="color:#2980b9;"><em><b><span new="" roman="" times="">Conclusion:</span></b></em></span><span new="" roman="" times=""><span style="color:#2980b9;"> </span>The prevalence of gestational diabetes in Iran is slowly increasing. The increasing prevalence of gestational diabetes can seriously threaten the health of mothers, fetuses, and newborns in the near future.</span> <span style="font-family:"Times New Roman","serif""></span></span></span><br> &nbsp;</span></span></span></p> prevalence, Gestational Diabetes, Meta-Analysis, Iran 35 49 http://nmcjournal.zums.ac.ir/browse.php?a_code=A-10-742-1&slc_lang=en&sid=1 Nasibeh Bolghanabadi nbolghanabadi67@gmail.com 100319475328460013842 100319475328460013842 No Department of Midwifery, Faculty of Nursing and Midwifery, Mashhad Medical Sciences, Islamic Azad University, Mashhad, Iran Roghieh Kharaghani r.kharaghani@zums.ac.ir 100319475328460013843 100319475328460013843 No Department of Midwifery, School of Nursing and Midwifery, Zanjan University of Medical Sciences, Zanjan, Iran Azadeh Hosseinkhani azihsnkhani@zums.ac.ir 100319475328460013844 100319475328460013844 Yes Department of Midwifery, School of Nursing and Midwifery, Zanjan University of Medical Sciences, Zanjan, Iran Sanaz Fayazi sanazfaiiazi@gmail.com 100319475328460013845 100319475328460013845 No Department of Midwifery, School of Nursing and Midwifery, Zanjan University of Medical Sciences, Zanjan, Iran Raziyeh Mossayebnezhad razi.mou73@gmail.com 100319475328460013846 100319475328460013846 No Department of Midwifery, School of Nursing and Midwifery, Zanjan University of Medical Sciences, Zanjan, Iran