“…First, to systemically assess the correlation between hyperglycemia in pregnancy and craniofacial malformation, we employed a meta-analysis ( Gurevitch et al, 2018 ) at the four typical steps (identification, screening, eligibility, and inclusion) on the literature available in PubMed, Embase, Cochrane Library and Web of Science databases ( Figure 1A ). In the final included studies ( Janssen et al, 1996 ; Moore et al, 2000 ; Åberg et al, 2001 ; Stott-Miller et al, 2010 ; Balsells et al, 2012 ; Trindade-Suedam et al, 2016 ; Yang et al, 2019 ; Tinker et al, 2020 ; Maniglio et al, 2022 ; Zhang et al, 2022 ), we selected all types of deformities involved in the development of head and facial bones, such as orofacial clefts, cleft lip and/or palate, and positional plagiocephaly. In the context of type I or II or gestational diabetes ( Figure 1B ).…”