When Do Subchorionic Hemorrhages Occur?

Subchorionic bleeding is when blood collects between the uterus and the gestational membranes during pregnancy. This is a frequent cause of vaginal bleeding during the first and second trimester of pregnancy. A study of nearly 64,000 pregnant women found that 1.7 percent experienced a subchorionic hemorrhage.

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?

It occurs when the placenta partially detaches from where it was implanted in the wall of your uterus. Subchorionic hematomas can be small or large. Small ones are more common. Larger ones tend to cause more bleeding and problems.