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Prenatal programming of behavior: a twin-study perspective.

Richard J Rose1

  • 1Department of Psychology, Indiana University, Room 132, Psychology Bldg, 1101 East Tenth Street, Bloomington, IN 47405, USA. rose@indiana.edu

Neuroscience and Biobehavioral Reviews
|April 7, 2005
PubMed
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Twin studies reveal insights into prenatal programming. Comparing identical twins helps understand fetal growth impacts on later health and behavior, though more research is needed.

Area of Science:

  • Human genetics
  • Developmental biology
  • Behavioral science

Background:

  • Prenatal programming links fetal development to later-life health and behavior.
  • Twin studies offer a unique model to disentangle genetic and environmental influences.

Purpose of the Study:

  • To review three co-twin comparison designs for studying prenatal programming.
  • To assess the utility of twin comparisons in understanding fetal growth and its long-term effects.

Main Methods:

  • Co-twin comparisons to replicate non-twin findings on fetal growth and disease risk.
  • Comparison of monozygotic (MZ) co-twins based on placental sharing.
  • Utilizing dermatoglyphic index of bilateral asymmetry in MZ twins as a marker for prenatal environmental buffering.

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Main Results:

  • Replication of fetal growth-disease associations in twins is mixed, potentially due to sample size and twin-specific growth factors.
  • Evidence suggests MZ twins with single placentation are more similar in cognitive ability and personality.
  • Preliminary findings indicate dermatoglyphic asymmetry may reflect prenatal environmental noise, but requires further validation in non-twin longitudinal data.

Conclusions:

  • Co-twin comparisons, particularly MZ co-twin analyses, provide a powerful approach for human prenatal programming research.
  • Further research with larger samples and longitudinal designs is necessary to confirm findings.
  • Twin studies offer incisive insights into the complex interplay of prenatal factors and later-life outcomes.