Obstetric oxytocin exposure and ADHD and ASD among Danish and Finnish children

Lonny Stokholm1, Mette Juhl2, Nicole M Talge3

  • 1Section of Epidemiology, Department of Public Health, University of Copenhagen, Copenhagen, Denmark.

Insights

Obstetric oxytocin use during labor induction was associated with a slight increase in attention deficit hyperactivity disorder (ADHD) and autism spectrum disorder (ASD) risk in offspring. However, this association is unlikely to be causal, allaying concerns about its clinical use.

Area of Science:

  • Perinatal medicine
  • Neurodevelopmental disorders
  • Pharmacovigilance

Background:

  • Previous studies suggested a potential link between prenatal exposure to obstetric oxytocin and increased risks of attention deficit hyperactivity disorder (ADHD) and autism spectrum disorder (ASD).
  • Given the widespread use of oxytocin in obstetric care, these potential risks warrant thorough investigation.

Purpose of the Study:

  • To investigate the association between obstetric oxytocin treatment for labor induction or augmentation and the risk of ADHD and ASD in offspring.
  • To address concerns regarding the safety of synthetic oxytocin in obstetric practice.

Main Methods:

  • A population-based study utilizing national registers from Denmark and Finland.
  • Inclusion of singleton births from Denmark (2000-2010) and Finland (1991-2010), followed until December 2015.
  • Definition of ADHD and ASD using diagnostic codes, with ADHD diagnosis further supported by medication data. Hazard ratios (HRs) were calculated using Cox proportional hazards models.

Main Results:

  • Oxytocin was administered in 31% (Denmark) and 46% (Finland) of deliveries.
  • Crude analyses showed a ~20% increased risk for ADHD and ASD with prenatal oxytocin exposure.
  • Adjusted analyses revealed a modest association: HR 1.03 (95% CI 1.01-1.05) for ADHD and HR 1.05 (95% CI 1.02-1.08) for ASD, consistent across countries and genders.

Conclusions:

  • An association was observed between synthetic oxytocin and ADHD/ASD, but it is unlikely to be causal.
  • The findings suggest that concerns about obstetric oxytocin use leading to ADHD or ASD are not supported.
  • This study helps to alleviate apprehension regarding the safety of oxytocin in labor induction and augmentation.
Abstract

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