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.

What causes internal bleeding during pregnancy?

During pregnancy, the body extends blood vessels into the uterus to support the growth of the embryo and uterine lining. The cervix may bleed more easily in the first few weeks after conception, particularly during sexual intercourse, pap smears, and pelvic exams.

Can internal bleeding affect pregnancy?

Yes, bleeding during pregnancy may cause injury to the baby. Bleeding during pregnancy could be caused by a number of things (1). One very serious condition that can cause bleeding is placental abruption (though abruption can also occur without visible bleeding).