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Fetal subdural intracranial hemorrhage — Clinical Guidelines

Overview

Fetal subdural intracranial hemorrhage (SDH) is a rare antenatal complication characterized by bleeding into the subdural space of the fetal brain, often associated with increased perinatal morbidity and mortality, and potential neurodevelopmental delays 1 2.

Diagnosis

Key Diagnostic Criteria: Identified via prenatal ultrasound (USG) or magnetic resonance imaging (MRI) 1 2.

Recommended Tests: Routine third-trimester USG, with MRI for detailed imaging when necessary 1 2.

Grading: Cases often categorized into grades (I-IV) based on severity and extent of hemorrhage 2.

Management

First-Line Treatments: Stopping aspirin if implicated 1.

Adjunctive Treatments: Cesarean delivery may be indicated for severe cases; intra-amniotic injections like ethacridine lactate considered in specific scenarios 2.

Monitoring: Serial ultrasounds to monitor hematoma size reduction 1.

Special Populations

Pregnancy: Antenatal low-dose aspirin use may predispose to fetal SDH; discontinuation may mitigate risk 1 3.

Pediatrics: Follow-up until at least 18 months for neurodevelopmental assessment 1.

Key Recommendations

Discontinue low-dose aspirin if fetal SDH is suspected or diagnosed to potentially reduce hemorrhagic risk (Evidence: Moderate 1 3).

Utilize serial prenatal imaging (USG/MRI) for monitoring hematoma progression and response to interventions (Evidence: Moderate 1 2).

Consider cesarean delivery for severe cases (grades III-IV) to ensure prompt neonatal care (Evidence: Weak 2).

Initiate thorough neurodevelopmental follow-up in surviving infants to assess long-term outcomes (Evidence: Expert opinion 1).

References

1 Thakur S, Thakur CS, Sharma A, Makhaik S. Fetal subdural hematoma in a pregnant woman on low-dose aspirin: idiopathic or drug-induced?. BMC pregnancy and childbirth 2025. link 2 Qi W, Luo JY, Li ZL, Zhang QJ, Liu ZD, Liao QP et al.. Clinical analysis of eight cases of fetal intracranial hemorrhage in pregnancy. The journal of maternal-fetal & neonatal medicine : the official journal of the European Association of Perinatal Medicine, the Federation of Asia and Oceania Perinatal Societies, the International Society of Perinatal Obstetricians 2021. link 3 Sasidharan CK, Kutty PM, Ajithkumar, Sajith N. Fetal intracranial hemorrhage due to antenatal low dose aspirin intake. Indian journal of pediatrics 2001. link 4 Strigini FA, Cioni G, Canapicchi R, Nardini V, Capriello P, Carmignani A. Fetal intracranial hemorrhage: is minor maternal trauma a possible pathogenetic factor?. Ultrasound in obstetrics & gynecology : the official journal of the International Society of Ultrasound in Obstetrics and Gynecology 2001. link

Fetal subdural intracranial hemorrhage