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Relationship of prepregnancy sex hormones to litter size in different 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), 9 (12 mo).
