INS and gestational diabetes: Based on the idea of poor compliance in adolescents and supported by the expected adverse obstetric and neonatal events provoked by both gestational diabetes and young (teen) age group, we tried to conduct this prospective cohort to evaluate possible complications occurred during pregnancy, delivery, and early neonatal period in gestational diabetic adolescent women with regard to the main treatment options involving lifestyle, insulin, and metformin (MTF).