NOS2 and gestational diabetes: Oral supplementation with quercetin (100 mg/kg) during neurulation (from embryonic day 6.5–9.5) reduced neural tube defects, apoptosis rate, nitric oxide synthase 2 (NOS-2) expression, and nitrosative stress parameters, followed by improvement of antioxidant responses by increased levels of superoxide dismutase 1 (SOD1) in STZ-induced-GDM mice.