Conservative Management of Small Subchorionic Hematoma in Early Pregnancy

Epidemiology

Diagnostic Imaging Characteristics

Risk Assessment

Management Recommendations (American College of Radiology)

Pregnancy Viability Assessment (American College of Radiology)

Transvaginal Ultrasound Diagnosis and Follow‑up of First‑Trimester Subchorionic Hemorrhage

Diagnostic Imaging

• Transvaginal ultrasound should be used to confirm a subchorionic hemorrhage, which appears as a crescent‑shaped, avascular (hypoechoic or anechoic) collection located between the chorion and the myometrium. – American College of Radiology guideline (high‑quality imaging recommendation) 4

Follow‑up Monitoring Protocol

• A follow‑up ultrasound is recommended 1–2 weeks after the initial scan to (a) verify ongoing fetal viability (presence of cardiac activity), (b) document the evolution of the hematoma (whether it is enlarging, stable, or resolving), and (c) reassess if new symptoms such as increased bleeding or cramping have developed. – American College of Radiology guideline (standard follow‑up schedule) 4

Patient Safety Counseling

• Patients should be instructed to seek immediate medical attention if they experience severe vaginal bleeding, severe abdominal cramping, or fever. – American College of Radiology guideline (urgent symptom guidance) 4