EGF-loaded Chitosan to Facilitate Healing and Prevent Scar Formation of Cesarean Wound

Inclusion Criteria: * Age of 18 or older * Planned for cesarean delivery with Pfannenstiel-incision * Had not received any treatment for scars at least one month before enrollment * Capable of understanding study protocol in order to sign the informed consent voluntarily Exclusion Criteria: * Currently taking any medication that might affect outcome evaluation of this study, including but not limited to: systemic corticosteroids or immunosuppressants * Currently undergoing any treatments involving lower abdomen, or planning to have such treatments * Having active infection involving abdomen at the time of recruitment * Concomitant severe or poorly-controlled illness (e.g., cardiovascular, renal, hepatic, pulmonary or gastrointestinal disease, malignancy or history of HIV infection) * With any abdominal tumor * Undergoing urgent cesarean delivery without proper pre-op standard procedure * Having known allergy to any of the ingredients in any of the products used in this study