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Caffeinated beverages and low birthweight: a case-control study.

B J Caan1, M K Goldhaber

  • 1Division of Research, Kaiser Permanente Medical Care Program, Oakland, CA 94611.

American Journal of Public Health
|September 1, 1989
PubMed
Summary
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Maternal caffeine consumption during early pregnancy may slightly increase the risk of low birthweight. Heavy intake of coffee, cola, and caffeine from all sources showed a modest association with adverse fetal growth outcomes.

Area of Science:

  • Obstetrics and Gynecology
  • Perinatal Medicine
  • Public Health

Background:

  • Maternal lifestyle factors, including dietary habits, significantly influence fetal development.
  • Caffeine is a widely consumed stimulant with potential effects on pregnancy outcomes.

Purpose of the Study:

  • To investigate the association between first-trimester maternal caffeine intake and the risk of low birthweight.
  • To quantify the impact of heavy caffeine consumption on fetal growth.

Main Methods:

  • A case-control study design was employed.
  • Data were collected from participants within the Kaiser Permanent Medical Care Program.
  • Maternal caffeine consumption was assessed from multiple sources including coffee, tea, and cola.

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Main Results:

  • Heavy caffeine consumption (over 3 servings/day of coffee/cola or >300 mg/day total) was linked to a marginally increased risk of low birthweight.
  • The findings suggest a modest but statistically relevant effect of caffeine on fetal growth.

Conclusions:

  • First-trimester maternal caffeine intake, particularly at high levels, may be associated with an increased risk of delivering a low birthweight infant.
  • These results corroborate previous research indicating a modest impact of caffeine on fetal growth and highlight the importance of monitoring maternal dietary habits during pregnancy.