Association Between First-Trimester Subchorionic Hematomas and Pregnancy Loss in Singleton Pregnancies

Subchorionic hematomas, or subchorionic hemorrhages, are common ultrasound findings in early pregnancy.   However, their significance is uncertain.  Some believe they increase the risk of many pregnancy complications, including pregnancy loss / miscarriage.  In this study of almost 3000 women, we found that Subchorionic hematoma does not increase the risk of pregnancy loss prior to 20 weeks.  This information is reassuring as nearly 20% of women will have this finding on ultrasound.

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