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Effect of embryonic thermal manipulation on the growth performance of broilers. (A) Body weight change; (B) weight gain change; (C) average daily feed intake; (D) body temperature change. Values are mean ± SEM, CON: n = 30, TM: n = 24. *P < 0.05, **P < 0.01, determined by an unpaired t test. Abbreviations: CON, control group; TM, thermal manipulation during embryonic development.
