Fig. 2From: Monochromatic green light stimulation during incubation shortened the hatching time via pineal function in White Leghorn eggsEffect of light treatment on the weight of embryo (a), liver (b), heart (c), and pectoral muscle (d) from d 17 to 21 post incubation. Asterisk indicates significant difference between groups at a given incubation stage (* P < 0.05). Data are presented as mean ± SEM (n = 2 per group)Back to article page