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Phenotype changes in gilts with different backfat thickness. Maternal backfat thickness (A) and body weight (B) at parturition day. (C) Piglet birth weight. (D) Number of piglets at birth. The concentrations of estradiol (E), progesterone (F), prolactin (G), prolactin, and FSH (H) in maternal serum. Values are mean ± SEM, n = 10. “*” and “**” indicate 0.01 < P ≤ 0.05 and 0.001 < P ≤ 0.01, respectively.
