Study design
This study is a superiority randomized, triple-blind clinical trial with two parallel groups at a ratio of 1:1. Participants were pregnant women at 12–20 weeks of pregnancy with indications of termination of pregnancy due to IUFD. They referred to the Department of Gynecology of Kamali Hospital affiliated with the Alborz University of Medical Sciences. We collected data from March 2021 to September 2021. The Medical Research Ethics Committee of the Iran University of Medical Sciences approved this study with code (IR.IUMS.REC.1399.1106). Participants provided informed consent to take part in the research. The present study is at the Iranian Registry of Clinical Trials (IRCT) with code number IRCT20181207041873N3 and adheres to the Consolidated Standards of Reporting Trials (CONSORT) guidelines.