Chorionic hematoma

Chorionic hematoma
Other namesChorionic hemorrhage, chorionic bleed
Ultrasound showing a subchorionic hemorrhage

Chorionic hematoma is the pooling of blood (hematoma) between the chorion, a membrane surrounding the embryo, and the uterine wall. It occurs in about 3.1% of all pregnancies, it is the most common sonographic abnormality and the most common cause of first trimester bleeding.

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