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Related Experiment Videos

Predicted birthweight for singletons and twins.

Yingxin C Liu1, Eve M Blair

  • 1Center for Child Health Research, University of Western Australia, Australia. liu@ichr.uwa.edu.au

Twin Research : the Official Journal of the International Society for Twin Studies
|February 8, 2003
PubMed
Summary

Opposite-sex twins grow faster than same-sex twins, and twins grow slower than singletons after 26 weeks gestation. Maternal factors also influence intrauterine growth rates in twins and singletons.

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Area of Science:

  • Obstetrics and Gynecology
  • Perinatology
  • Human Growth and Development

Background:

  • Intrauterine growth is influenced by numerous factors, including maternal characteristics and fetal sex.
  • Understanding twin growth patterns is crucial for optimizing perinatal outcomes.

Purpose of the Study:

  • To investigate the impact of co-twin gender on intrauterine growth.
  • To determine the influence of infant gender, maternal height, age, and parity on singleton and twin growth rates.

Main Methods:

  • Population-based study utilizing birth data from Western Australia (1980-1995).
  • Multiple linear regression models were employed to analyze growth determinants.

Main Results:

  • Selected variables explained 76% of birthweight variance in twins and 51% in singletons.

Related Experiment Videos

  • Twins exhibited slower growth than singletons from 26 weeks gestation.
  • Opposite-sex twin pairs demonstrated faster growth than like-sex pairs.
  • First-time mothers (primiparous) had twin pairs with slower growth compared to subsequent births.

    • Conclusions:

    • Co-twin gender significantly impacts intrauterine growth, with opposite-sex pairs growing faster.
    • Maternal factors and twin gender combinations are key determinants of intrauterine growth.
    • Developed regression equations can aid in assessing appropriate intrauterine growth for twin pairs.