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Neurodevelopmental Outcomes After Assisted Reproductive Technologies.

Jacques Balayla1, Odile Sheehy, William D Fraser

  • 1Departments of Obstetrics and Gynecology and Psychiatry and the School of Rehabilitation and the Faculty of Pharmacy, University of Montreal, the Research Unit on Medications and Pregnancy, Research Center, CHU Sainte-Justine, the Departments of Pediatrics, Human Genetics, and Pharmacology & Therapeutics, McGill University, Montreal Children's Hospital and Research Institute of the McGill University Health Centre, the Department of Obstetrics and Gynecology, Research Institute of the McGill University Health Center, and École d'orthophonie et d'audiologie, Université de Montréal, Montréal, the Department of Obstetrics and Gynecology, Université de Sherbrooke, Centre de Recherche du CHUS, Sherbrooke, and the School of Psychology, Laval University, and the Population Health and Optimal Health Practices Research Unit, CHU de Québec-Université Laval Research Centre, Québec City, Québec, Canada.

Obstetrics and Gynecology
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PubMed
Summary

Children conceived via assisted reproductive technologies (ART) show no developmental differences in cognition, motor skills, or language at age two compared to naturally conceived children. These findings support counseling for individuals undergoing ART.

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Area of Science:

  • Reproductive Medicine
  • Developmental Pediatrics
  • Neuroscience

Background:

  • Assisted reproductive technologies (ART) are increasingly used worldwide.
  • Concerns exist regarding potential long-term neurodevelopmental effects in children conceived via ART.
  • Understanding child development outcomes after ART is crucial for clinical practice.

Purpose of the Study:

  • To compare cognitive, motor, and language development at 2 years of age in children conceived via ART versus natural conception.
  • To assess neurodevelopmental outcomes using standardized assessments at 24 months postpartum.

Main Methods:

  • Prospective cohort study (3D-Study, 2010-2012) with 2,366 pregnant women.
  • ART group (n=278) included various ART techniques; natural conception group (n=2,088) was the reference.
  • Neurodevelopmental outcomes assessed using Bayley Scales and MacArthur-Bates Inventories at 24 months.
  • Adjusted linear regression models analyzed the effect of ART on neurodevelopment.

Main Results:

  • 175 ART-conceived children and 1,345 naturally conceived children assessed at 24 months.
  • No significant differences observed in cognitive, motor, or language scores between ART and natural conception groups after confounder adjustment.
  • Specific ART techniques (in vivo vs. in vitro) also showed no differential impact on neurodevelopmental outcomes (P>.05).

Conclusions:

  • Children born after ART demonstrate comparable cognitive, motor, and language development to those conceived naturally at two years of age.
  • Findings suggest ART does not adversely affect early neurodevelopmental trajectories.
  • Results can inform clinical counseling for patients undergoing assisted reproductive technologies.