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Teratogenic effects of benzodiazepine use during pregnancy
L Laegreid1, R Olegård, J Walström
1Department of Pediatrics II, Gothenburg University, Sweden.
Insights
Maternal use of benzodiazepines during pregnancy may cause birth defects. Exposed infants showed dysmorphic features, growth issues, and CNS abnormalities, suggesting teratogenic effects.
Area of Science:
- Perinatology
- Neuroscience
- Teratology
Background:
- Benzodiazepine use during pregnancy is common.
- Potential risks to fetal development require further investigation.
Purpose of the Study:
- To investigate the potential teratogenic effects of prenatal benzodiazepine exposure in humans.
Main Methods:
- Observational study of eight infants exposed in utero to benzodiazepines.
- Clinical assessment of dysmorphic features, growth, and neurological status.
- Autopsy findings in one deceased infant.
- Analysis of maternal benzodiazepine use through self-reporting and blood concentrations.
Main Results:
- Infants exhibited characteristic dysmorphic features, growth aberrations, and CNS abnormalities.
- Dysmorphic features resembled fetal alcohol syndrome but with distinct cranial nerve involvement.
- One infant experienced mortality with evidence of neuronal migration disorders.
- Maternal benzodiazepine use was confirmed in all cases.
Conclusions:
- Prenatal benzodiazepine exposure is associated with a distinct pattern of congenital abnormalities.
- Benzodiazepines may act as human teratogens, necessitating caution in their use during pregnancy.
Abstract:
Eight children exposed in utero to benzodiazepines had characteristic dysmorphic features, growth aberrations, and central nervous system abnormalities from birth. Their dysmorphic characteristics resembled those of the fetal alcohol syndrome, although they had greater focal involvement of cranial nerves, with a sullen and expressionless face, and they more often had impairment of vitality at birth. One infant died and at autopsy had varying degrees of distortion of neuronal migration, with concomitant heterotopias. Five of the eight mothers had regularly consumed benzodiazepines, and the three remaining mothers had blood samples during pregnancy revealing benzodiazepine concentrations indicative of regular use. Our findings indicate that maternal consumption of benzodiazepines may be teratogenic in humans.