Dengue in Pregnancy Obstetric Management and Peripartum Care
On this page
Direct answer
Dengue in pregnancy carries more maternal risk than in non-pregnant adults, mainly from plasma leakage, bleeding and late recognition of shock. Management is supportive: watch for warning signs, give isotonic crystalloid in measured amounts guided by haematocrit and urine output, and use paracetamol rather than NSAIDs or aspirin. Vertical transmission is uncommon, but maternal viraemia close to delivery raises the risk of neonatal infection.
What you must remember
- Warning signs: abdominal pain or tenderness, persistent vomiting, mucosal bleeding, lethargy or restlessness, liver enlargement above 2 cm, and a rising haematocrit with a falling platelet count.
- Critical phase: plasma leakage usually begins as fever settles, around days 3 to 7 of illness, so defervescence is the danger window.
- Fluid management: isotonic crystalloid in measured volumes, reassessed by pulse, blood pressure, urine output and haematocrit, because over-hydration risks pulmonary oedema.
- Analgesia: paracetamol only; NSAIDs and aspirin impair platelet function and worsen bleeding.
- Peripartum haemorrhage: thrombocytopenia and coagulopathy raise bleeding risk at delivery, and neuraxial anaesthesia is decided against platelet thresholds on which books differ.
- Vertical transmission: uncommon; neonatal risk is highest when maternal viraemia occurs near delivery, and the newborn is monitored for thrombocytopenia and infection.
A stage-wise pathway from suspicion to delivery
A pregnant woman with dengue is managed by stage, not by the day of fever alone. Each step tells the team what to check next.
- Confirm and classify: send NS1 antigen early in illness or IgM serology later, with platelet count and haematocrit, then classify as dengue without warning signs, with warning signs, or severe, using WHO categories.
- Admit with warning signs: monitor haematocrit, platelets, pulse, blood pressure and urine output at intervals through the critical phase, with obstetric review.
- Replace fluid carefully: give isotonic crystalloid according to severity and reassess repeatedly, because pregnant women can compensate for shock and then decompensate abruptly.
- Guard against bleeding: check coagulation and platelets before any procedure, and avoid NSAIDs and aspirin throughout the illness.
- Plan delivery on obstetric grounds: mode of delivery follows obstetric indications rather than dengue alone, and invasive procedures are minimised during thrombocytopenia.
- Protect the neonate: alert the neonatal team if maternal viraemia is present at delivery, and monitor the baby for thrombocytopenia and sepsis.
Where the exam tries to catch you
Dengue questions in pregnancy test drug choice and delivery planning more than diagnosis.
- Trap: Giving aspirin or ibuprofen for fever. Correct: Use paracetamol, because NSAIDs and aspirin increase bleeding in thrombocytopenia.
- Trap: Treating a falling platelet count as the only trigger for action. Correct: A rising haematocrit, falling urine output and signs of shock guide fluid and transfusion decisions.
- Trap: Assuming caesarean section is required for maternal dengue. Correct: Dengue alone is not an indication for caesarean; obstetric indications decide the mode of birth.
Frequently asked questions
Which test confirms dengue in a pregnant woman with fever?
NS1 antigen is useful early in illness, and dengue IgM serology becomes positive later, around the fifth day. Platelet count and haematocrit are tracked alongside. Dengue in pregnancy is therefore a combined clinical and laboratory diagnosis, not a single test result.
Why is paracetamol preferred over NSAIDs in dengue during pregnancy?
Paracetamol controls fever without impairing platelet function. NSAIDs and aspirin inhibit platelet aggregation and can worsen bleeding in dengue with thrombocytopenia. Dengue in pregnancy therefore uses paracetamol for fever and avoids these drugs throughout the illness.
Does dengue cause vertical transmission in pregnancy?
Vertical transmission of dengue is uncommon. Neonatal disease is more likely when maternal viraemia is present near delivery. Dengue in pregnancy with viraemia at birth calls for neonatal monitoring for thrombocytopenia and sepsis.
What is the main obstetric danger of dengue near delivery?
Thrombocytopenia and coagulopathy from dengue raise the risk of bleeding during labour and after delivery. Fluid overload can cause pulmonary oedema, so fluids are measured carefully. Obstetric teams plan monitoring, blood products and anaesthetic review before delivery.