Association Between Maternal Hypertension During Pregnancy and Offspring Epilepsy Risk
Maternal hypertension during pregnancy—including gestational hypertension, preeclampsia, and eclampsia—is associated with a significantly increased risk of epilepsy in offspring, with the strongest association observed in children born at term or post-term and in those exposed to eclampsia.
Evidence from Population-Based Studies
Risk Magnitude in Term and Post-Term Infants
Children exposed to mild preeclampsia in utero have a 16% increased risk of epilepsy when born at term (≥37 weeks) and a 68% increased risk when born post-term, according to a Danish national cohort study of over 1.5 million births followed for up to 27 years 1.
Severe preeclampsia confers a 41% increased epilepsy risk in term infants and a 157% increased risk in post-term infants, demonstrating a dose-response relationship between preeclampsia severity and offspring seizure susceptibility 1.
Eclampsia exposure is associated with a 29% increased epilepsy risk in term infants but a striking 403% increased risk in post-term infants, representing the strongest association among all hypertensive disorders of pregnancy 1.
Absence of Association in Preterm Births
- No significant association between preeclampsia or eclampsia and epilepsy was found among children born preterm (<37 weeks), suggesting that the mechanisms linking maternal hypertension to offspring seizures may be gestational-age dependent or that competing risks in preterm infants obscure the relationship 1.
Recent Mechanistic and Clinical Evidence
Contemporary Human Data
A 2025 analysis of the Epic Cosmos dataset, Iowa and Stanford cohorts, and a large Taiwanese cohort all demonstrated significantly elevated seizure rates in children of mothers with gestational hypertension, even after adjusting for multiple covariates including gestational age, birth weight, and maternal comorbidities 2.
Women with eclampsia have a more than 5-fold increased risk of developing epilepsy themselves within months to years after delivery (adjusted HR 5.31,95% CI 2.85–9.89), and their offspring face parallel risks, suggesting shared pathophysiologic mechanisms 3.
Experimental Mouse Model Findings
An angiotensin II mouse model of gestational hypertension demonstrated that maternal hypertension significantly increased seizure grade and mortality in male—but not female—offspring when challenged with pilocarpine or electrical stimulation, revealing sex-dependent programming of seizure susceptibility 2.
Proinflammatory and microglial gene expression in the brain were upregulated only in male offspring from hypertensive dams, and depletion of microglia with PLX5622 or anti-inflammatory treatment with pentoxifylline abolished the sensitized seizure response and lowered mortality 2.
A phenylephrine model of gestational hypertension (lacking the proinflammatory aspects of angiotensin II) induced similar offspring seizure phenotypes, suggesting that elevated blood pressure itself—independent of inflammation—programs seizure vulnerability, though neuroinflammatory mechanisms amplify the risk 2.
Clinical Implications and Surveillance Recommendations
Postpartum Maternal Monitoring
Women with gestational hypertension, preeclampsia, or eclampsia should have blood pressure monitored for 72 hours in hospital and for 7–10 days after delivery, as the majority of hypertension-related maternal deaths occur postpartum when blood pressure peaks 4.
Guidelines recommend lifelong annual medical review for all women with hypertensive disorders of pregnancy because they face significantly increased lifetime cardiovascular risk and—based on emerging evidence—neurological risk including epilepsy 5, 3.
Offspring Surveillance
At postpartum follow-up visits for women with gestational hypertension or preeclampsia, caregivers should inquire about new-onset neurological symptoms in both mother and child, including seizures, headaches, and developmental concerns, as this population is vulnerable to neurological disorders 3.
Children born at term or post-term to mothers with preeclampsia or eclampsia warrant heightened clinical vigilance for seizure disorders, particularly male offspring given the sex-dependent risk observed in experimental models 1, 2.
Pathophysiologic Mechanisms
Neuroinflammatory Programming
Maternal hypertension appears to program offspring seizure susceptibility through neuroinflammatory mechanisms involving microglial activation, with male offspring disproportionately affected, possibly due to sex differences in immune responses or hormonal modulation of inflammation 2.
The finding that both angiotensin II (proinflammatory) and phenylephrine (non-inflammatory) models produce similar offspring phenotypes suggests that hemodynamic stress itself alters fetal brain development, with inflammation amplifying but not solely driving the effect 2.
Gestational Age Dependency
- The absence of association in preterm infants may reflect competing pathologies (e.g., prematurity-related brain injury) that overshadow hypertension-specific effects, or alternatively, the critical window for hypertension-induced programming may occur in late gestation 1.
Common Pitfalls and Caveats
Do not dismiss gestational hypertension as benign—at least 25% of cases progress to preeclampsia, and even isolated gestational hypertension without progression is associated with increased offspring seizure risk 5.
Recognize that the absence of proteinuria does not exclude preeclampsia or its associated risks—proteinuria is present in only ~75% of preeclampsia cases, and organ dysfunction defines the diagnosis 5.
Avoid assuming that successful blood pressure control during pregnancy eliminates offspring risk—the experimental data suggest that even transient hypertension exposure programs long-term neurological vulnerability through developmental mechanisms 2.
Be aware that family history of hypertension is associated with preeclampsia in women, and preeclampsia is associated with hypertension in offspring, creating intergenerational cycles of cardiovascular and neurological risk 6.