The most common cause of postpartum hemorrhage

Written by Liu Wei Jie
Obstetrics
Updated on September 05, 2024
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Postpartum hemorrhage is divided into two scenarios. The first type occurs within 24 hours after childbirth and is seen in four situations. The first is due to inadequate uterine contraction, the second is trauma to the soft birth canal, the third concerns placental factors, and the fourth involves coagulation disorders. The second type of hemorrhage is late postpartum bleeding, which occurs one to two months after childbirth. This can be associated with postpartum infections, slow recovery of physical condition postpartum, retained products, and poor healing of cesarean section scars.

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Written by Zhang Yin Xing
Obstetrics
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Does postpartum breastfeeding cause bleeding?

Bleeding caused by postpartum breastfeeding generally occurs within 42 days after delivery, during which the mother has lochia secretion. Breastfeeding promotes the secretion of oxytocin, which acts on the uterus and causes it to contract, facilitating the expulsion of lochia and aiding in the recovery of the uterus. Typically, by 42 days postpartum, the uterus has returned to its non-pregnant size and the expulsion of lochia is essentially complete. Subsequent breastfeeding is not directly related to vaginal bleeding. Another situation is due to the increase in prolactin during lactation; menstrual periods may not have fully resumed in women who are breastfeeding, and abnormal uterine bleeding may occur. As long as the amount and duration of bleeding do not exceed normal menstrual flow, no special treatment is needed.

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Written by Zhang Lu
Obstetrics
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Does postpartum hemorrhage require a blood transfusion?

The definition of postpartum hemorrhage is bleeding greater than 500 milliliters approximately 24 hours after vaginal delivery. Whether blood transfusion is necessary for postpartum hemorrhage mainly depends on the specific amount of bleeding. For average women, if the hemoglobin level is normal before delivery and the bleeding is between 500-1000 milliliters, the body can compensate for the anemia through normal adjustments, and generally, a blood transfusion is not required. However, if the bleeding exceeds 1000 milliliters, this situation is considered massive hemorrhage and must be treated with a blood transfusion, otherwise it may lead to hemorrhagic shock or DIC (Disseminated Intravascular Coagulation).

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Written by Zhang Lu
Obstetrics
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Should the uterus be removed due to severe postpartum hemorrhage?

Whether postpartum hemorrhage requires hysterectomy primarily depends on the severity of the hemorrhage and the specific causes of the postpartum hemorrhage. First, if the amount of postpartum hemorrhage is very substantial, leading to conditions like DIC in the pregnant woman, and if not removing the uterus may cause ongoing bleeding, it is essential to remove the uterus quickly to reduce vaginal bleeding. Second, if the postpartum hemorrhage is caused by issues like amniotic fluid embolism or poor contraction of the uterus, and conservative treatments are ineffective, it is also necessary to make a prompt decision to remove the uterus.

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Written by Liu Wei Jie
Obstetrics
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Why is uterine curettage necessary for postpartum hemorrhage?

We encounter a situation where postpartum hemorrhage is caused by the presence of residual material inside the uterus, which can influence the contraction of the uterus. This condition can lead to severe postpartum hemorrhage. The most important solution for postpartum hemorrhage is to immediately stop the bleeding. Therefore, by removing the residual material from the uterine cavity, the uterus can return to its normal contraction, achieving the purpose of immediately stopping the bleeding. It is also very common to need uterine evacuation after childbirth, as this process might cause some trauma to the uterus. Although it can be somewhat traumatic, this trauma is minimal compared to severe postpartum hemorrhage. In such cases, we must carefully weigh the pros and cons and decisively decide to proceed with the evacuation of the uterus.

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Written by Zhang Lu
Obstetrics
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Causes of Late Postpartum Hemorrhage

Late postpartum hemorrhage refers to a significant amount of vaginal bleeding that occurs two to three weeks after a cesarean section or natural childbirth. The causes of late postpartum hemorrhage include the following aspects. First, the presence of residuals in the uterine cavity, such as when the placenta or membranes remain within the uterine cavity after childbirth, can repeatedly stimulate the endometrium causing bleeding. Second, poor healing of the uterine incision during a cesarean section can lead to post-cesarean bleeding, a condition that easily causes late postpartum hemorrhage. Third, poor healing of episiotomy or perineal laceration wounds after natural childbirth can also potentially lead to late postpartum hemorrhage.