What Causes Subchorionic Hemorrhage?

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Subchorionic bleeding takes place while the placenta detaches from area where it was anchored with membrane. That is called a subchorionic hemorrhage or hematoma. This detachment leads to pooling of blood within the folds of placental membrane. Subchorionic hematomas are simply one reason of bleeding in pregnant women. Their particular reason is not fully known. Some people may confuse it with spotting that is totally different thing.  According American Pregnancy Association spotting may occur in about 20% of women within 12 weeks of their pregnancies while SCH is common within first and second trimester of pregnancy. 

Some common etiological factors of spotting are:

  • Implantation
  • Extra-uterine growth
  • Sex
  • Hormone imbalance
  • Cervical modifications, together with cervical polyps (small growths)
  • Vaginal Infections

Spotting is though different from subchorionic hemorrhage but it is ideal way to report any form of spotting to your health practitioner, the symptoms are very exclusive from vaginal bleeding. Bleeding that leaves some spots is often a sign of something else. Subchorionic bleeding is one such possibility. You could not even realize you've got one till your doctor performs an ultrasound.

Heavy bleeding also can be a sign of:

  • Ectopic pregnancy
  • Miscarriage
  • Unprecedented circumstance that outcomes in a mass of tissue within the womb
  • Uterine rupture
  • Separation of the placenta from the uterus
  • Preterm exertions (in advance than 37 weeks)



In some cases vaginal bleeding also observed by different symptoms, like intense belly pain and dizziness.Such kind of manifestation might be relate to subchorionic hemorrhage but you always need to have digital ultrasound to make it confirm. Some other reasons for such manifestation are

  • Girls who had just their fertilized eggs implanted.
  • Abrupt uterine rupture
  • Preterm labor.

In short, SCH in small size should be taken lightly because most of the women having small subchorionic hemorrhage have normal and healthy pregnancy outcome but they must be monitored properly thorough out the pregnancy to counter any unknown complication. In spite the fact that small SCH does not pose much harm to fetus but always consult your health care provider whenever you feel any kind of bleeding to rule out risk of complications.