The genetic predictors of birth weight are in genes associated with height (LCORL and HMGA2)12, type 2 diabetes (CDKAL1 and ADCY5)12, blood pressure (ADRB1)12, possibly epigenetic processes (CCNL1)24, and 5q11.2 whose function is not clearly understood. The gene discussed is CDKAL1; the disease is type 2 diabetes mellitus.