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Children conceived using ICSI do not have an increased risk of delayed mental development at 5 years of age

G I Leslie1, F L Gibson, C McMahon

  • 1Departments of Obstetrics and Gynaecology, University of Sydney Northern Clinical School, Australia. gleslie@med.usyd.edu.au

Human Reproduction (Oxford, England)
|September 26, 2003
PubMed

Insights

Children conceived via intracytoplasmic sperm injection (ICSI) show no increased risk of delayed cognitive development by age five. Parental genetics, not conception method, appears to be the key factor in long-term intellectual ability.

Area of Science:

  • Reproductive Medicine
  • Developmental Psychology
  • Pediatrics

Background:

  • Previous studies indicated a potential risk of developmental delays in ICSI children.
  • Concerns arose from a 1998 study showing higher risks in ICSI children at age one.
  • Reassessment was needed to evaluate long-term cognitive outcomes.

Purpose of the Study:

  • To assess the long-term cognitive development of children conceived via ICSI.
  • To compare intellectual abilities of ICSI, IVF, and naturally conceived children at age five.
  • To identify factors influencing cognitive development in these groups.

Main Methods:

  • Evaluated 97 ICSI, 80 IVF, and 110 naturally conceived children at five years old.
  • Utilized Wechsler Preschool and Primary Scales of Intelligence to measure IQ.
  • Employed multivariate analysis to identify predictors of cognitive ability.

Main Results:

  • No significant difference in mean full-scale IQ was observed between ICSI (110), IVF (111), and naturally conceived (114) children.
  • ICSI children did not exhibit an increased risk of delayed cognitive development (IQ <85).
  • Lower maternal education level was the sole significant predictor of below-average IQ.

Conclusions:

  • The mode of conception (ICSI, IVF, natural) does not significantly impact long-term intellectual ability.
  • Genetic influence from parental cognitive ability is a more critical determinant of child's IQ.
  • Findings alleviate concerns regarding developmental outcomes associated with ICSI.
Abstract

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