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Relationship of prepregnancy level of (A) cortisol, (B) IGF1, (C) glucagon, (D) insulin, (E) FT3, (F) GH, (G) FT4, and (H) leptin to litter size indifferent breeds of minipigs at 8, 10, and 12 mo of age. The line represents linear regression of data, with R2 ≥ 0.16 (Pearson r ≥ 0.4) and P < 0.05 indicating significant correlation. Tibet, n = 8 per group; Bama, n = 8 per group; Wuzhishan, n = 8 (8 mo), 9 (10 mo), and 9 (12 mo).
