Table 1 List of all inclusion and exclusion criteria

✓ Patients with primary bilateral herniae suitable for laparoscopic hernia repair

× Recurrent or incarcerated herniae

✓ Age ≥ 18 years

× Presence of acute systemic infection

✓ Full legal competence

× Expected non-compliance with the requirements of the trial

✓ Patient has given written informed consent

× Severe comorbidity (ASA ≥ 4)

× Expectancy of life < 12 months

× Chemotherapy within the last 4 weeks

× Radiation therapy within the last 2 months

× Allergy to porcine or bovine antigens

× Simultaneous participation in other interventional trials

× Persons who are in a dependency/ employment relationship with the sponsor or one of the clinical investigators

× Placement in an institution due to legal or governmental order