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[Teratogenicity of anticonvulsant drugs (author's transl)]
Insights
Anticonvulsant drugs may increase the risk of hydantoin-barbiturate embryopathy in children of epileptic mothers. However, convulsions during pregnancy, not the medications, appear to cause malformations and cerebral damage.
Area of Science:
- Neurology
- Teratology
- Developmental Pediatrics
Context:
- Epilepsy in pregnancy poses risks to both mother and child.
- Anticonvulsant medications are often necessary but carry potential teratogenic risks.
- Understanding the specific risks associated with different anticonvulsant regimens is crucial.
Purpose:
- To investigate the association between maternal anticonvulsant use during pregnancy and the occurrence of embryopathy and other malformations in offspring.
- To differentiate the teratogenic effects of anticonvulsants from the impact of maternal convulsions during pregnancy.
Summary:
- This study examined 111 children born to epileptic mothers, comparing those exposed to anticonvulsants (93 pregnancies) with those unexposed (18 pregnancies).
- Hydantoin-barbiturate embryopathy occurred in 7.1% of infants after hydantoin monotherapy and 17.6% after combination therapy.
- No embryopathy was observed in children of untreated epileptic mothers. Malformations and cerebral damage were more frequent in infants of mothers experiencing convulsions during pregnancy, suggesting convulsions, not anticonvulsants, are the primary cause.
Impact:
- Findings suggest that maternal convulsions during pregnancy, rather than anticonvulsant medications themselves, may be the significant factor contributing to malformations and cerebral damage in offspring.
- This research can inform clinical practice regarding the management of epilepsy in pregnant women, emphasizing seizure control to mitigate developmental risks.
Abstract:
Investigations were done on 111 children of epileptic mothers who used anticonvulsants in 93 pregnancies and none in 18 pregnancies. Hydantoinbarbiturate embryopathy was found in 7.1% after hydantoin monotherapy, in 17.6% after combination of hydantoin and barbiturates or primidone. No embryopathy was seen in children of untreated epileptic mothers. Children of untreated and treated epileptic mothers had an approximately equal frequency of marked single malformations and cerebral damage without dysmorphia. However, malformation and cerebral damage without dysmorphia was found significantly more frequently in children of mothers on anticonvulsant drugs with convulsions during pregnancy as compared to children of mothers without convulsions. Single manifestations and cerebral damage without dysmorphia are probably not caused by anticonvulsants but by convulsions during pregnancy.