Level 3	The mechanism for recurrence of ventral hernia described in the literature in decreasing order of frequency are infection, lateral detachment of the mesh, inadequate mesh fixation, inadequate mesh, inadequate overlap, missed hernias, raised intraabdominal pressure, and trauma
Level 4	The mechanism of recurrence can be improperly placed transfascial sutures, overly large bites of mesh causing excessive tension, and, ultimately, a hole in the mesh.
Level 4	Mesh shift may be a precursor to hernia recurrence. Mesh tends to shift away from the operative side, leading to recurrence. Recurrence may be a two-step process, beginning first with intraoperative mesh shift followed by additional factors (e.g. mesh contraction) that may accentuate the shift and lead to recurrence
Level 4	Recurrence can occur at defects occurring at transfascial suture sites of previous laparoscopic ventral hernia mesh repair