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Bleeding during pregnancy can be caused by miscarriage, placenta problems, premature labor, stillbirth retention, or uterine rupture. Placental abruption can be life-threatening for both mother and baby.
Among the most common causes of a hemorrhage during pregnancy are miscarriage and tissue left over after a miscarriage. In some cases, excessive bleeding may develop due to problems with the placenta. Other possible causes include premature labor and retention of a stillbirth in the uterus. Uterine rupture can also contribute to bleeding but is much less common than other causes.
A common cause of bleeding during pregnancy is a miscarriage. This can occur, for example, when there has been a pregnancy loss and the body is trying to push out tissue or clots left in the woman’s uterus. Bleeding can also occur because tissue left over in the uterus after a pregnancy leads to an infection.
Sometimes bleeding during pregnancy is the result of problems with the placenta. For example, the placenta may tear partially or completely from the uterine wall and cause excessive bleeding. Unfortunately, this condition, called placental abruption, can threaten the life of the unborn child and the mother. Also, a woman may experience bleeding during pregnancy not because the placenta has detached from the wall of the uterus, but because the placenta is abnormally positioned inside the uterus. This condition, called placenta previa, occurs when the placenta is placed over the opening of the uterus.
The death of an unborn baby can also lead to hemorrhaging during pregnancy. This cause is most likely to occur in the first trimester of pregnancy. It is not a common cause of bleeding during the second or third semester of pregnancy, although it can occur occasionally.
Premature labor can also cause bleeding during pregnancy. Premature labor begins before the 37th week of pregnancy, at which point a pregnancy is considered full-term. The average full-term pregnancy lasts about 40 weeks. Many women go into premature labor and have no bleeding. In some cases, however, a problem within the uterus leads to excessive bleeding. This can happen, for example, if there were problems with the placenta or if there are abnormal growths inside the uterus.
Uterine rupture is also among the possible causes of bleeding during pregnancy. It occurs when the uterus opens up and causes the baby to move into the mother’s abdomen. Fortunately, it’s not as common as other problems that cause excessive bleeding during pregnancy. When a uterine rupture occurs, however, it puts the fetus and mother in serious danger.
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