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PubMed This is a summary of 23 peer-reviewed journal articles Updated
Hematology

What Causes Delayed Postpartum Hemorrhage in VWD?

At a Glance

Delayed postpartum hemorrhage in Von Willebrand Disease is caused by the "postpartum crash"—a rapid drop in blood-clotting proteins 1 to 3 weeks after childbirth. As natural pregnancy protections fade, women with VWD require careful monitoring and preventive treatments like TXA at home.

Bringing your baby home is an exciting milestone, and with proper coordination between your obstetrician and hematologist, your bleeding risks can be safely managed. However, it is important to know that for women with Von Willebrand Disease (VWD), the risk of severe bleeding requires ongoing attention even after leaving the hospital. Delayed, or secondary, postpartum hemorrhage is caused by a rapid drop in your body’s blood-clotting proteins—often referred to as the “postpartum crash”—which typically occurs between one and three weeks after giving birth [1][2]. While your body naturally ramps up its production of Von Willebrand factor (VWF) (a protein that helps blood clot) during pregnancy to protect you during delivery [3][4], these protective levels plummet quickly once the baby is born [3]. Because of this drop, women with VWD have up to a 15% chance of experiencing delayed bleeding weeks after leaving the hospital, compared to just 1% of the general population [5].

The “Postpartum Crash” Explained

During pregnancy, your body produces higher amounts of Von Willebrand factor and Factor VIII (another crucial clotting protein) to prepare for childbirth [3][6]. For many women with milder forms of VWD, such as Type 1, these levels can even rise into the normal range [3][4].

However, this natural protection is temporary. After delivery, the hormonal changes that supported pregnancy reverse, causing VWF and Factor VIII levels to fall drastically [1][6]. This “postpartum crash” means your clotting factor levels return to their pre-pregnancy baseline, usually within one to three weeks [3][1]. During this window, when you are healing at home and initial hospital treatments have worn off, your blood loses its enhanced ability to clot, creating a high-risk period for secondary postpartum hemorrhage [7][8].

Recognizing the Signs of Delayed Postpartum Hemorrhage

Because secondary hemorrhage happens at home, it is critical to know the warning signs. While some postpartum bleeding (lochia) is normal, delayed hemorrhage requires immediate medical intervention [9][10]. Go to the emergency room and immediately request a hematology consult if you experience:

  • Heavy bleeding: Soaking through one or more heavy-duty maxi pads in an hour, or bleeding that suddenly increases instead of tapering off over time [9][10].
  • Large clots: Passing blood clots larger than the size of a golf ball or plum [9][10].
  • Signs of blood loss: Feeling dizzy, lightheaded, abnormally weak, confused, or experiencing a racing heartbeat [9][10].
  • Foul-smelling discharge or fever: Which can indicate an infection (endometritis) or retained tissue in the uterus, both of which can trigger severe bleeding on top of your VWD [11][12].

Tip: Always carry a treatment letter from your hematologist or a bleeding disorder wallet card. General emergency room staff may not be immediately familiar with VWD protocols, and this documentation ensures you get rapid, appropriate care.

Prevention and Protecting Yourself at Home

Preventing a delayed hemorrhage requires proactive planning with a multidisciplinary team, including your obstetrician and a hematologist [13][14]. Standard preventative care often includes:

  • Extended Tranexamic Acid (TXA): TXA is an antifibrinolytic medication, meaning it prevents blood clots from breaking down prematurely. Doctors frequently prescribe a course of TXA for women with VWD to take at home for several weeks after hospital discharge [15][16]. This helps manage bleeding while your VWF levels are dropping, and studies show it does not increase the risk of dangerous blood clots [17][18].
  • Factor Replacement Therapy: Depending on the severity and type of your VWD (especially Types 2 and 3), your doctor may schedule ongoing IV infusions of VWF concentrate for a period of time after you go home [14][19].
  • Safe Postpartum Pain Relief: Standard postpartum care often relies on NSAIDs (non-steroidal anti-inflammatory drugs like ibuprofen or naproxen) for cramping. However, NSAIDs inhibit platelet function and can significantly increase your bleeding risk [20][21]. Always coordinate safe pain relief options (such as acetaminophen) with your hematologist [22][23].
  • Breastfeeding and Medications: If you plan to breastfeed, discuss this closely with your care team. They can ensure your preventative medications, including TXA and factor replacement, are managed safely for both you and your baby while protecting you from a crash.
  • Monitoring: Your care team may check your VWF and Factor VIII levels in the weeks following delivery to track your “crash” and adjust medications as needed [14][13].

Common questions in this guide

Can You Develop Von Willebrand Disease Later in Life?Can You Get an Epidural with Von Willebrand Disease?Can You Have Iron Deficiency Without Anemia in VWD?Can You Play Sports with Von Willebrand Disease?Does Stress Affect Von Willebrand Disease Test Results?How Do Antifibrinolytics Work for VWD Bleeding?How Does Type O Blood Affect Von Willebrand Disease?How Is Von Willebrand Disease Inherited?Dental Work with Von Willebrand Disease: How to PrepareIs an IUD Safe for Women with Von Willebrand Disease?What is a DDAVP Challenge Test for Von Willebrand Disease?What Is a Heavy Period with Von Willebrand Disease?Low VWF vs. Type 1 VWD: What is the Difference?Type 2N VWD vs. Hemophilia A: What's the Difference?Does Von Willebrand Disease Affect Life Expectancy?What Pain Meds Are Safe for Von Willebrand Disease?What's in a VWD Emergency Travel Letter?When Are Nosebleeds a Sign of Von Willebrand Disease?Why Must I Restrict Fluids After DDAVP?
Why does delayed postpartum hemorrhage happen with Von Willebrand Disease?
During pregnancy, blood-clotting proteins naturally rise to protect you, but they drop rapidly one to three weeks after giving birth. This sudden drop, known as the postpartum crash, removes the body's natural protection and leads to a high risk of delayed, severe bleeding at home.
What are the warning signs of a delayed postpartum hemorrhage?
Warning signs include soaking through a heavy-duty maxi pad in an hour, bleeding that suddenly increases, passing blood clots larger than a plum, or feeling dizzy and weak. If you experience these symptoms, go to the emergency room immediately and request a hematology consult.
What pain relievers are safe for postpartum cramping if I have VWD?
Standard non-steroidal anti-inflammatory drugs (NSAIDs) like ibuprofen or naproxen can increase your bleeding risk by interfering with how your blood clots. You should coordinate safe pain relief options, such as acetaminophen, directly with your hematologist and obstetrician.
Is it safe to breastfeed while taking medications to prevent bleeding?
Yes, but you must plan this carefully with your medical team. Your doctors can select and manage preventative treatments, like TXA and factor replacement therapy, to ensure they are safe for both you and your baby while you breastfeed.
How long will I need to take extended tranexamic acid (TXA) at home?
The length of time depends on your specific clotting factor levels and overall bleeding risk. Your doctor will likely prescribe it for several weeks after you leave the hospital to help control bleeding while your natural clotting proteins return to their pre-pregnancy baseline.

Questions for Your Doctor

6 questions

  • •What is my specific target VWF level before we can safely discontinue TXA or factor replacement?
  • •Exactly how long will I need to stay on my extended tranexamic acid (TXA) or factor replacement regimen at home?
  • •What pain relief medications are safe for me to use for postpartum cramping that won't increase my bleeding risk?
  • •Are my prescribed preventative treatments (like TXA and factor) safe for my baby while I am breastfeeding?
  • •Who is my on-call contact if I start bleeding heavily at 2 AM—my OB or my hematologist?
  • •Can you provide a specific emergency treatment letter for me to hand to the ER staff if I need to go to the hospital?

Questions for You

5 questions

  • •Do I have my emergency contacts, including my hematologist's direct line, easily accessible at home?
  • •Do I have my TXA prescription filled and in hand before being discharged from the hospital?
  • •How far away is the nearest emergency room equipped to handle bleeding disorders, and who will drive me if I begin bleeding heavily?
  • •Am I tracking my daily bleeding (pad counts and clot sizes) so I can notice if the bleeding suddenly worsens?
  • •Have I discussed the signs of the 'postpartum crash' with my partner or support system so they can help monitor me for symptoms like dizziness or confusion?

References

References (23)
  1. 1

    Von Willebrand factor and von Willebrand disease in ageing: mechanisms, evolving phenotypes, and clinical implications.

    Seidizadeh O, Atiq F, Connell NT, et al.

    The Lancet. Haematology 2025; (12(11)):e908-e917 doi:10.1016/S2352-3026(25)00262-5.

    PMID: 41193118
  2. 2

    Practical aspects of factor concentrate use in patients with von Willebrand disease undergoing invasive procedures: a European survey.

    Windyga J, Dolan G, Altisent C, et al.

    Haemophilia : the official journal of the World Federation of Hemophilia 2016; (22(5)):739-51 doi:10.1111/hae.12955.

    PMID: 27292438
  3. 3

    Contemporary issues in the management of von Willebrand disease.

    Federici AB, Königs C, James AH

    Thrombosis and haemostasis 2016; (116 Suppl 1()):S18-25 doi:10.1160/TH16-01-0050.

    PMID: 27528278
  4. 4

    Comorbidities associated with higher von Willebrand factor (VWF) levels may explain the age-related increase of VWF in von Willebrand disease.

    Atiq F, Meijer K, Eikenboom J, et al.

    British journal of haematology 2018; (182(1)):93-105 doi:10.1111/bjh.15277.

    PMID: 29767844
  5. 5

    Postpartum Hemorrhage in Patients with Type 1 von Willebrand Disease: A Systematic Review.

    Pierce-Williams RAM, Makhamreh MM, Blakey-Cheung S, et al.

    Seminars in thrombosis and hemostasis 2022; (48(2)):219-228 doi:10.1055/s-0041-1736572.

    PMID: 34749402
  6. 6

    Von Willebrand factor and disease: a review for laboratory professionals.

    Harris NS, Pelletier JP, Marin MJ, Winter WE

    Critical reviews in clinical laboratory sciences 2022; (59(4)):241-256 doi:10.1080/10408363.2021.2014781.

    PMID: 34962443
  7. 7

    Bleeding patterns in patients before and after diagnosis of von Willebrand disease: Analysis of a US medical claims database.

    Roberts JC, Malec LM, Halari I, et al.

    Haemophilia : the official journal of the World Federation of Hemophilia 2022; (28(1)):97-108 doi:10.1111/hae.14448.

    PMID: 34761486
  8. 8

    Type 3 von Willebrand Disease in Pregnancy: A Systematic Literature Review.

    Makhamreh MM, Kass SL, Russo ML, et al.

    American journal of perinatology 2021; (38(5)):436-448 doi:10.1055/s-0039-1700541.

    PMID: 31756759
  9. 9

    Hemorrhage-related maternal morbidity of secondary compared to primary postpartum hemorrhage.

    Carroll MR, Tounsi S, Gerard JL, et al.

    Journal of perinatal medicine 2025; (53(9)):1208-1215 doi:10.1515/jpm-2025-0165.

    PMID: 40966109
  10. 10

    Subinvolution of the placental site as the cause of hysterectomy in young woman.

    Triantafyllidou O, Kastora S, Messini I, Kalampokis D

    BMJ case reports 2021; (14(2)) doi:10.1136/bcr-2020-238945.

    PMID: 33558383
  11. 11

    Secondary postpartum hemorrhage: Incidence, etiologies, and clinical courses in the setting of a high cesarean delivery rate.

    Chainarong N, Deevongkij K, Petpichetchian C

    PloS one 2022; (17(3)):e0264583 doi:10.1371/journal.pone.0264583.

    PMID: 35231065
  12. 12

    Secondary postpartum hemorrhage due to uterine scar dehiscence, a case report.

    Mraihi F, Basly J, Mezni A, et al.

    International journal of surgery case reports 2023; (112()):108883 doi:10.1016/j.ijscr.2023.108883.

    PMID: 37883876
  13. 13

    Examining international practices in the management of pregnant women with von Willebrand disease.

    Lavin M, Sánchez Luceros A, Kouides P, et al.

    Journal of thrombosis and haemostasis : JTH 2022; (20(1)):82-91 doi:10.1111/jth.15561.

    PMID: 34661341
  14. 14

    Von Willebrand Disease and Pregnancy: Management Protocol From Labor to the Postpartum Period.

    Muñoz Vargas BA, Contreras Valero SJ, Aragon Mendoza RL, et al.

    Cureus 2024; (16(2)):e53465 doi:10.7759/cureus.53465.

    PMID: 38435184
  15. 15

    Pregnancy and delivery in women with von Willebrand disease.

    Castaman G, James PD

    European journal of haematology 2019; (103(2)):73-79 doi:10.1111/ejh.13250.

    PMID: 31107984
  16. 16

    Obstetric bleeding among women with inherited bleeding disorders: a retrospective study.

    Hawke L, Grabell J, Sim W, et al.

    Haemophilia : the official journal of the World Federation of Hemophilia 2016; (22(6)):906-911 doi:10.1111/hae.13067.

    PMID: 27704714
  17. 17

    Maternal and neonatal bleeding complications in relation to peripartum management in hemophilia carriers: A systematic review.

    Punt MC, Waning ML, Mauser-Bunschoten EP, et al.

    Blood reviews 2021; (49()):100826 doi:10.1016/j.blre.2021.100826.

    PMID: 33775466
  18. 18

    Pregnancy management for patients with bleeding disorders.

    Patel N, Bannow BS

    Hematology. American Society of Hematology. Education Program 2025; (2025(1)):496-502 doi:10.1182/hematology.2025000742.

    PMID: 41348000
  19. 19

    Type 2B von Willebrand Disease in Pregnancy: A Systematic Literature Review.

    Makhamreh MM, Russo ML, Karl T, et al.

    Seminars in thrombosis and hemostasis 2021; (47(2)):201-216 doi:10.1055/s-0041-1723799.

    PMID: 33636751
  20. 20

    von Willebrand disease: A guide for the internist.

    Kaur V, Elghawy O, Deshpande S, Riley D

    Cleveland Clinic journal of medicine 2024; (91(2)):119-127 doi:10.3949/ccjm.91a.22033.

    PMID: 38307601
  21. 21

    Monitoring Therapy during Treatment of von Willebrand Disease.

    Favaloro EJ, Pasalic L, Curnow J

    Seminars in thrombosis and hemostasis 2017; (43(3)):338-354 doi:10.1055/s-0036-1585080.

    PMID: 27472426
  22. 22

    2025 ASH ISTH NBDF WFH monitoring report on the 2021 clinical guidelines on the diagnosis and management of von Willebrand disease.

    James PD, Flood VH, Connell NT

    Blood advances 2025; (9(14)):3553-3555 doi:10.1182/bloodadvances.2025016512.

    PMID: 40273329
  23. 23

    von Willebrand disease.

    Seidizadeh O, Eikenboom JCJ, Denis CV, et al.

    Nature reviews. Disease primers 2024; (10(1)):51 doi:10.1038/s41572-024-00536-8.

    PMID: 39054329

This page provides educational information about delayed postpartum bleeding risks in Von Willebrand Disease. Always consult your hematologist and obstetrician for personal medical advice.

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