During fetal development, abnormal openings may occur in the pericecal, small bowel, transverse colon, or sigmoid mesentery, as well as the omentum, leading to mesenteric hernias.

在胎儿段，这种异常的裂隙可能生在盲肠旁、小肠、横结肠结肠和网膜，造成肠系膜疝。