The impact of subchorionic hematoma in the first trimester on maternal and neonatal outcomes in singleton pregnancies

Objective: Subchorionic hematoma (SCH) is considered as one of the most frequent complications during pregnancy. The Purpose of the present study was to explore the potential relationship between SCH during the first trimester of pregnancy and maternal and neonatal outcomes in singleton pregnancies. Methods: This case-control study was performed from January 2024 to January 2025.In the present study, 552 pregnant women included based on the inclusion criteria (276 with SCH and 276 without SCH). Of these, 276 were diagnosed with SCH based on first-trimester ultrasound findings (case group), and the remaining 276 had no signs of SCH (control group). Results: A significant relationship was observed between SCH and certain adverse outcomes, including preterm delivery, NICU admission, and miscarriage rates (P0.05). Moreover, 34 women (13.5%) had hematomas measuring greater than 3 cm in size, while 215 women (85.7%) had hematomas of 3 cm or smaller (P