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Umbilical blood flow and neonatal morphometry: a multivariate analysis

J L Bartha1, R Comino-Delgado, C Gonzalez-Mena

  • 1Department of Obstetrics and Gynaecology, University Hospital of Puerto Real, Cadiz, Spain. jbarthar@sego.es

European Journal of Obstetrics, Gynecology, and Reproductive Biology
|June 27, 1998
PubMed
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Umbilical blood flow significantly impacts newborn size. Height and ponderal index are key predictors of umbilical S/D ratio, influencing fetal growth and neonatal morphometry, especially in cases of placental insufficiency.

Area of Science:

  • Perinatal medicine
  • Fetal development
  • Neonatal morphometry

Background:

  • Umbilical blood flow assessment is crucial for monitoring fetal well-being.
  • Neonatal morphometry provides insights into fetal growth and development.
  • Placental insufficiency can significantly impact fetal growth.

Purpose of the Study:

  • To investigate the relationship between umbilical blood flow parameters and neonatal morphometric measurements.
  • To identify the key predictors of umbilical systolic to diastolic (S/D) ratio in relation to fetal growth.

Main Methods:

  • Data from 460 pregnant women were analyzed.
  • Umbilical systolic to diastolic (S/D) ratio was measured within three days before birth.
  • Neonatal morphometric parameters including weight, height, head and chest circumferences, ponderal index, and head to chest circumference ratio were recorded.

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Main Results:

  • Univariate analysis showed weight as the best correlate with S/D ratio (r=-0.35).
  • Multivariate regression identified height and ponderal index as the strongest predictors of S/D ratio.
  • Small-for-gestational-age fetuses with placental insufficiency exhibited more severe reductions in weight, height, head, and chest circumference compared to those with normal placental perfusion.

Conclusions:

  • Umbilical blood flow is a significant determinant of neonatal morphometry.
  • While weight shows the best single correlation, height and ponderal index are the most influential factors identified through multivariate analysis.
  • Placental insufficiency leads to more pronounced impairments in neonatal morphometry, though ponderal index decrease is comparable to other causes of small-for-gestational-age fetuses.