This multicenter prospective randomized controlled trial aims to investigate the ishtmocele rates after c-section delivery depending on using different suture materials for the uterine closure.

The study involves 5 health centers (two universities, three private hospitals). Patients who will undergo their first cesarean section because of any etiology (except emergent cases) will be included in the study. Operation Nurse will randomize the patients into two groups depending on the monofilament or poly filament suture material. Patients will be checked by transvaginal ultrasound on a postoperative day one, postoperative first month, and postoperative sixth month. As the primary result, the istmocele rates will be compared between the study groups.

Inclusion Criteria:

• 18-40 yrs women
• Primary elective cesarean section
• First delivery
• Without any systemic diseases

Exclusion Criteria:

• emergent delivery
• previous c-section history
• congenital uterine abnormality