Hemorrhaging after birth, known as postpartum hemorrhage, is heavy bleeding from the vagina following delivery. It’s traditionally defined as losing 500 milliliters or more of blood after a vaginal birth, or 1,000 milliliters or more after a cesarean. A large meta-analysis of over 42 million women found that roughly 1 in 8 vaginal births involves this level of blood loss when measured objectively, making it one of the most common serious complications of childbirth.
Primary vs. Secondary Hemorrhage
Postpartum hemorrhage falls into two categories based on timing. Primary hemorrhage happens within the first 24 hours after delivery. This is the more common and typically more urgent type, often occurring in the first few hours while you’re still in the hospital or birthing center.
Secondary hemorrhage is abnormal or excessive bleeding that starts anywhere from 24 hours to 12 weeks after birth. Because it happens after you’ve gone home, it can catch new parents off guard. The causes differ somewhat from primary hemorrhage, and it requires prompt medical attention even though it may seem less dramatic than bleeding right after delivery.
What Causes It
The causes of postpartum hemorrhage are grouped into four categories, sometimes called the “four Ts”: tone, trauma, tissue, and thrombin.
- Tone (uterine atony): After delivery, your uterus is supposed to contract tightly to clamp shut the blood vessels where the placenta was attached. When those contractions are too weak, the blood vessels keep bleeding. This accounts for up to 80% of postpartum hemorrhages.
- Trauma: Tears or damage to the vagina, cervix, uterus, or perineum during delivery can cause significant bleeding on their own.
- Tissue: If the placenta doesn’t fully separate from the uterine wall, retained fragments prevent the uterus from contracting properly and keep the bleeding going.
- Thrombin (clotting problems): If you have a blood clotting disorder or a pregnancy-related condition that impairs clotting, even small amounts of bleeding can escalate quickly.
Who Is at Higher Risk
Several factors increase the likelihood of postpartum hemorrhage. Uterine atony is more common in people who have had multiple previous pregnancies, are carrying twins or multiples, had excess amniotic fluid during pregnancy, or experienced prolonged labor. A baby weighing 4,000 grams (about 8 pounds 13 ounces) or more also raises the risk because the uterus has been stretched further than usual.
A personal history of postpartum hemorrhage is one of the strongest predictors. Research published in the American Journal of Obstetrics & Gynecology found that even a family history of hemorrhage in a first-degree relative (your mother or sister) increases your odds by about 63%. A history of blood transfusions is also significantly associated with higher risk.
Signs to Recognize
The clearest warning sign is heavy or gushing blood from the vagina. A practical benchmark from the American College of Obstetricians and Gynecologists: soaking through two pads an hour for more than one to two hours is heavier than normal postpartum bleeding. You may also pass large blood clots.
Other signs reflect what happens as your body loses blood volume:
- Feeling faint, dizzy, or weak
- Pale or clammy skin
- Rapid heart rate
- Low blood pressure
- Confusion
- Pain and swelling near the vagina or the area between the vagina and anus
These symptoms can develop gradually or come on suddenly. In the hospital, nursing staff monitor for these signs closely in the hours after delivery. At home, any combination of heavy bleeding with lightheadedness or a racing pulse warrants emergency care.
How It’s Prevented
Most birth facilities use a set of preventive steps during the third stage of labor, which is the period between the baby’s birth and delivery of the placenta. This bundle typically includes giving a medication that helps the uterus contract, gentle traction on the umbilical cord to help deliver the placenta, and external uterine massage. These steps significantly reduce the chance of hemorrhage by encouraging the uterus to clamp down quickly after delivery.
How It’s Treated
When hemorrhage occurs, treatment depends on the cause and severity. Because uterine atony is behind the vast majority of cases, the first approach is medication to strengthen uterine contractions. If the uterus still isn’t contracting well, providers can massage it externally or compress it manually.
When medications alone aren’t enough, a balloon device can be placed inside the uterus. The balloon is inflated to apply direct pressure against the uterine walls, physically compressing the bleeding vessels. This is called uterine tamponade, and it buys time while other measures take effect or serves as the definitive treatment.
In more severe cases that don’t respond to these steps, surgical options include compression sutures that physically cinch the uterus to reduce blood flow. As a last resort, surgical removal of the uterus (hysterectomy) stops the bleeding entirely, but this is reserved for life-threatening situations where nothing else has worked. A medication that helps blood clot more effectively may also be given alongside these interventions.
If the cause is retained placental tissue rather than atony, the treatment focuses on removing those fragments. Tears or lacerations are repaired with stitches. Clotting disorders may require blood products to replace missing clotting factors.
Recovery After Hemorrhage
Significant blood loss during delivery often leads to iron deficiency anemia, which can leave you feeling exhausted, short of breath, and foggy in the weeks after birth. This goes beyond typical new-parent fatigue. Your body has lost a substantial amount of the iron it uses to carry oxygen in your blood, and rebuilding those stores takes time.
Oral iron supplements are the standard starting point for recovery, but they can cause stomach upset and constipation, and some people don’t absorb them well enough to recover quickly. Intravenous iron therapy is increasingly used as a first-line treatment after hemorrhage because it restores iron stores faster and produces a more significant rise in blood counts compared to oral supplements. In cases of severe blood loss, a blood transfusion may be necessary.
Recovery timelines vary depending on how much blood was lost and your overall health before delivery. Mild hemorrhage with prompt treatment may add only a few extra days of monitoring and some weeks of iron supplementation. Severe hemorrhage can mean a longer hospital stay, possible time in an intensive care unit, and months of rebuilding your energy and blood counts. Physical recovery aside, experiencing a hemorrhage can be frightening, and many people find the emotional aftermath just as significant as the physical one.