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What Are The Causes Of Postpartum Hemorrhage

2025-11-16


Postpartum bleeding refers to an increase in vaginal secretions and significant blood loss after childbirth, which is a common postpartum complication. Although most mothers can safely pass through this period, excessive bleeding can lead to life-threatening situations. So, why does postpartum hemorrhage occur?

There are various reasons for postpartum hemorrhage, among which the most common is insufficient uterine contractions or loss of elasticity. After childbirth, the uterus needs to contract to help stop bleeding and restore the uterus to a normal state. If the uterus cannot contract sufficiently, blood vessels cannot close and blood will continue to flow, leading to bleeding. In addition, rupture of the endometrium, retention of placental tissue, and cervical tears may also lead to postpartum hemorrhage.

In addition, the physical condition of the mother can also affect the risk of postpartum hemorrhage. For example, diseases such as anemia, hypertension, and preeclampsia can increase the risk of postpartum hemorrhage. Prolonged labor, improper delivery methods, and multiple pregnancies can also increase the risk of bleeding.

The methods for preventing postpartum hemorrhage mainly include timely diagnosis and treatment of high-risk factors before delivery, selecting appropriate delivery methods, maintaining good uterine contractions after delivery, avoiding prolonged fatigue, and avoiding excessive sexual activity. At the same time, during the delivery process, doctors will also take a series of measures, such as using oxytocin drugs, performing cervical dilation, etc., to reduce the risk of bleeding.

In short, postpartum hemorrhage is a common complication that needs to be taken seriously. Understanding the causes of its occurrence and taking appropriate prevention and treatment measures can help reduce the risks for pregnant women and ensure their health and safety.

1、 The cause of postpartum hemorrhage

Insufficient uterine contractions or loss of elasticity: After delivery, the uterus needs to contract sufficiently to help stop bleeding and restore its normal state. If the uterine contractions are insufficient or lose elasticity, blood vessels cannot be tightly closed, and blood will continue to flow away, leading to bleeding.

Endometrial rupture: Postpartum endometrial rupture is also a common cause of postpartum hemorrhage. Endometrial rupture can expose blood vessels, leading to massive bleeding. Retained placental tissue: If the placenta is not completely expelled after childbirth, residual placental tissue can cause the uterus to be unable to fully contract, leading to bleeding.

Cervical laceration: During childbirth, the cervix may be torn, leading to bleeding. Especially in cases of rapid delivery and larger fetuses, the risk of neck lacerations is higher. Pregnancy complications: If there are diseases such as hypertension, anemia, and preeclampsia during pregnancy, the risk of postpartum hemorrhage will also increase. In addition, conditions such as multiple pregnancies and amniotic fluid embolism may also lead to postpartum hemorrhage.

Delivery method: Delivery method may also affect the risk of postpartum hemorrhage. For example, although cesarean section can avoid some risks of vaginal delivery, the risk of postoperative bleeding increases due to the presence of a large number of blood vessels at the incision site.

2、 How to prevent postpartum hemorrhage

Conduct prenatal check ups in advance to promptly detect and treat high-risk factors that may cause postpartum hemorrhage, such as anemia, uterine fibroids, etc.

Choose an appropriate delivery method, such as vaginal delivery or cesarean section. The most suitable delivery method should be selected based on factors such as the physical condition of the mother, the size of the fetus, and the difficulty of delivery.

Accurately assess the risk of postpartum hemorrhage. For high-risk mothers, a prevention plan for postpartum hemorrhage should be developed before delivery to reduce the occurrence of complications.