Effects of castration and testosterone treatment on body weights and serum testosterone concentrations. (A) Body weights. (B) Serum testosterone concentrations. IM: intact male pigs fed an HFC diet; CM: castrated male pigs fed an HFC diet; CMT: castrated male pigs fed an HFC diet and given testosterone replacement therapy. Data are expressed as means ± SEMs, n = 6 per group. **P < 0.01.