Around week 8 of development the neuroblasts get to the proximal colon of the gut, and then they pass through the distal colon, and around week 12 they finally the reach the rectum.

在胚胎发育的第8周左右，神经母细胞到达肠道的结肠近端，之后穿过结肠远端； 在第12周左右到达直肠。