Fig. 3From: Monochromatic green light stimulation during incubation shortened the hatching time via pineal function in White Leghorn eggsHistological structure of embryonic pineal gland on d 10 (a), 14 (b) and 18 (c) post incubation in the 0L:24D group d, e and f represented the counterpart in the 12L:12D group. FL, follicle; LM, lumen; WT, wall thickness.Back to article page