A system for categorizing gestational DM, designed to predict the maternal and fetal M&M White's classification–modified Class Duration Lesions Therapy A Any None Diet only B < 10 Yrs None Insulin C 10-19 Yrs None Insulin D > 20 Yrs Benign retinopathy Insulin F Any Nephropathy Insulin H Any Heart disease Insulin R Any Proliferative retinopathy Insulin