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Maternal build and pregnancy outcome

P Rantakallio1, E Läärä, M Koiranen

  • 1Department of Public Health Science and General Practice, University of Oulu, Finland.

Journal of Clinical Epidemiology
|February 1, 1995
PubMed
Summary

Maternal build impacts pregnancy outcomes. Lower body mass index (BMI) in mothers did not predict poorer infant health, challenging the idea that a BMI of 20-25 is optimal for pregnancy.

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Area of Science:

  • Reproductive Medicine
  • Maternal-Fetal Medicine
  • Public Health

Background:

  • Maternal build, including body mass index (BMI), height, and weight, is a key factor in pregnancy.
  • Previous assumptions suggested an optimal BMI range (20-25) for maternal health and pregnancy outcomes.
  • Understanding the relationship between maternal physique and infant health is crucial for prenatal care.

Purpose of the Study:

  • To investigate the association between maternal body measurements (BMI, height, weight) and pregnancy outcomes.
  • To compare pregnancy outcomes between two birth cohorts from Northern Finland (1966 and 1985-86).
  • To determine if maternal BMI values between 20-25 offer a better prognosis for the child compared to lower BMI values.

Main Methods:

  • Analysis of prospectively collected data from 10,969 women (1966 cohort) and 9,128 women (1985-86 cohort).
  • Outcomes measured included preterm birth, perinatal and childhood mortality (up to 4 years), low birth weight (<2500g), and small for gestational age (SGA) infants.
  • Additive logistic regression models adjusted for maternal age, parity, smoking, marital status, father's social class, and residence.

Main Results:

  • Women in the earlier cohort were shorter and lighter on average than those in the later cohort.
  • A higher percentage of women in the later cohort had a BMI below 20 compared to the earlier cohort.
  • No evidence found that maternal BMI values of 20-25 predicted better child prognosis than values below 20.

Conclusions:

  • Maternal build characteristics, specifically BMI, do not appear to negatively impact pregnancy outcomes as previously assumed.
  • The study challenges the notion of a specific optimal BMI range for mothers, suggesting lower BMIs may not be detrimental.
  • Further research is needed to fully elucidate the complex interplay between maternal physique and diverse pregnancy outcomes.

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