According to March of Dimes , many women experience light bleeding or spotting from the vagina during pregnancy. Spotting does not require a pad or tampon, and it can occur at any time between conception and giving birth.
The collection of blood between the womb and the gestational membranes can result in blood clots called subchorionic hematomas, which can be small or large and may lead to vaginal bleeding. Some women will not experience any symptoms at all, and will only find out they have SCH during a routine ultrasound examination.
Subchorionic bleeding does not usually cause any problems. However, research on whether SCH can cause pregnancy complications, such as preterm delivery or pregnancy loss, varies. For example, a review found possible links between SCH and a higher risk of giving birth prematurely and of pregnancy loss. However, a study found that SCH did not increase the risk of pregnancy loss.
Another possible complication is placental abruption. This is a severe complication that happens when the placenta detaches from the womb lining. The main symptom of placental abruption is vaginal bleeding, but a pregnant woman may also feel discomfort and tenderness, and a pain in the belly or back that comes on suddenly and does not go away.
To diagnose the cause of the bleed, a doctor will usually perform a physical examination and may order blood tests. Remember: The vast majority of subchorionic hematomas dissolve on their own. However in rare cases, a subchorionic bleed can cause the placenta to separate from the uterine wall , and it may be linked to an elevated risk of miscarriage and preterm labor — which is why it's so important to let your doctor know right away if you ever experience vaginal bleeding during pregnancy.
It's normal and healthy to worry when you notice vaginal bleeding or spotting during pregnancy. But know that subchorionic bleeding usually ends in a healthy pregnancy — and since you'll be checked with ultrasounds until the hematoma reabsorbs itself, you'll get reassurrance each time you see your baby's heartbeat.
If you notice vaginal bleeding during any point of your pregnancy, call your practitioner. What to Expect follows strict reporting guidelines and uses only credible sources, such as peer-reviewed studies, academic research institutions and highly respected health organizations.
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Use of this site is subject to our terms of use and privacy policy. Registry Builder New. Then you and your doctor can manage any complications sooner rather than later. For example, call if: You have sudden, severe pain in your belly or pelvis. You passed out lost consciousness. You have severe vaginal bleeding.
Call your doctor now or seek immediate medical care if: You are dizzy or light-headed, or you feel like you may faint. You have new or increased pain in your belly or pelvis. You have new or more vaginal bleeding. You have pain in the vaginal area.
You have a fever. You think you may have passed tissue. Save any tissue that you pass. Take it to your doctor's office as soon as you can. Images like this are not suggestive of blood beneath the membranes. What causes subchorionic hematomas or subchorionic clots? Usually, we cannot identify any cause for a subchorionic clot.
On rare occasions, there will be an underlying cause, such as a maternal coagulation disturbance, history of trauma, severe maternal hypertension or early-onset preeclampsia, or maternal abuse of vasoactive drugs such as cocaine or amphetamines. There is also a case report of a large subchorionic hematoma occurring after thrombolytic therapy during pregnancy. What problems can subchorionic hematomas or subchorinic clots cause?
Subchorionic bleeds do increase the chance pregnancy complications, particularly miscarriage and preterm delivery. Sharma and colleagues described pregnancies with a suspected subchorinic clot; 5. The preterm delivery rate among those who experienced bleeding was
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