Exposure to Paracetamol in Early Pregnancy and the Risk of Developing Cerebral Palsy: A Case-Control Study Using...

Area of Science:

• Obstetrics and Gynecology
• Pediatrics
• Neuroscience

Background:

• Maternal use of paracetamol (acetaminophen) during pregnancy is common.
• Concerns exist regarding potential neurodevelopmental effects of prenatal paracetamol exposure.
• Cerebral palsy (CP) is a significant concern in pediatric neurology.

Purpose of the Study:

• To investigate the association between maternal paracetamol use in early pregnancy and the risk of cerebral palsy in offspring.
• To analyze exposure levels (unexposed, mildly exposed, highly exposed) and their correlation with CP.
• To examine associations stratified by term/preterm birth and CP subtypes.

Main Methods:

• A registry and biobank-based case-control study involving mother-child pairs.
• Identified 322 CP cases and 343 general controls plus 258 preterm controls from Norwegian registries (1995-2014).
• Measured serum paracetamol concentrations in maternal samples (gestation weeks 10-14) using logistic regression, adjusting for confounders.

Main Results:

• Maternal serum paracetamol levels indicated 36.8% unexposed, 53.2% mildly exposed, and 10% highly exposed.
• Overall prenatal paracetamol exposure was not associated with an increased risk of cerebral palsy.
• Sensitivity and subgroup analyses revealed no clear associations across term/preterm births or CP subtypes.

Conclusions:

• The study does not support a link between early pregnancy paracetamol exposure and the risk of cerebral palsy.
• The findings suggest paracetamol use in early pregnancy is not associated with CP.
• The exposure estimation relied on a single serum sample, highlighting a limitation for definitive conclusions.