GDM-IFH (12.3%, OR 1.657 [1.020–2.692], p = 0.041) and GDM-CH women (13.5%, OR 1.671 [1.046–2.668], p = 0.032) were at higher risk of delivering neonates that were LGA compared to GDM-IPH (6.5%). Here, C4B is linked to gestational diabetes.