When Does Subchorionic Hematoma Happen?

We see subchorionic hematomas or suspect subchorionic clots in perhaps 1% of pregnancies in the between 13 and 22 weeks. Most of these occur in women who have had vaginal bleeding.

How early can you have a subchorionic hemorrhage?

Subchorionic hemorrhage and subchorionic hematoma are the most common cause of vaginal bleeding in patients who are 10 to 20 weeks gestational age and make up about 11% of cases.

What causes a subchorionic hemorrhage in early pregnancy?

Subchorionic bleeding occurs when the placenta detaches from the original site of implantation. This is called a subchorionic hemorrhage or hematoma. It affects the chorionic membranes. These lift apart and form another sac between the placenta and the uterus.