Inclusion Criteria:  The subject is aged between 20 and 80 years old. Patients who need a cesarean section. The expected size of the wound is about 5 cm or more in length and 2 cm or more in width.  Exclusion Criteria:  Patients with a history of allergy to chitin components such as shrimp and crab. Patients with blood clotting disorders. Vulnerable groups. Patients with unstable signs of life.