Body mass index (BMI) of OLETF and LETO males and females on PND1, -7, -15, and -23. Data are presented as means ± SE. *P < 0.05, ***P < 0.001 for the females, #P < 0.05, ###P < 0.001 for the males (for strain differences at each age) (n = 6–10 per group).