“…Several investigations have shown that low serum 25(OH)D concentrations are associated with some adverse neonatal and pregnancy outcomes [ 65 , 66 , 67 , 68 ]. In this context, several reviews and meta-analyses support the notion that low serum 25(OH)D concentrations are a risk factor for hypertensive disorders in pregnancy such as pre-eclampsia, and for gestational diabetes mellitus [ 69 , 70 , 71 , 72 , 73 , 74 , 75 , 76 , 77 , 78 ]. Moreover, in the majority of the published meta-analyses low serum 25(OH)D concentration in pregnant women are associated with an increased risk of their children for childhood asthma, wheeze, respiratory tract infections, allergic rhinitis, and eczema [ 79 , 80 , 81 , 82 , 83 , 84 , 85 ].…”