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Birth weight references for twins.

S J Min1, B Luke, B Gillespie

  • 1Center for Statistical Consultation and Research, University of Michigan, Ann Arbor 48109-0264, USA.

American Journal of Obstetrics and Gynecology
|May 20, 2000
PubMed
Summary
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New fetal growth references show twins grow slower than singletons after 30 weeks gestation. However, well-grown twins and singletons exhibit similar growth patterns, challenging previous assumptions.

Area of Science:

  • Perinatology
  • Maternal-Fetal Medicine
  • Neonatology

Background:

  • Establishing accurate fetal and birth weight references is crucial for monitoring twin pregnancies.
  • Existing references may not adequately capture the unique growth trajectory of twins.

Purpose of the Study:

  • To develop novel fetal and birth weight reference standards specifically for twins using longitudinal data.
  • To compare twin growth patterns with established singleton references.

Main Methods:

  • A historic cohort study involving 1831 twin pregnancies.
  • Data collected from multiple US centers for births at or after 28 weeks' gestation.

Main Results:

  • Twin percentiles fall below singleton references starting around 28-30 weeks gestation.

Related Experiment Videos

  • Significant weight discrepancies emerge, with twins being notably lighter by 40 weeks.

    • Conclusions:

    • A new reference for twin fetal growth indicates slower growth compared to singletons from approximately 30 weeks.
    • Well-grown twins and singletons demonstrate less divergence than previously thought, suggesting nuanced growth considerations.