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Related Experiment Video

Updated: Jan 7, 2026

Author Spotlight: Studying the Impact of Maternal Dietary Deficiencies on Long-Term Offspring Health Outcomes
03:19

Author Spotlight: Studying the Impact of Maternal Dietary Deficiencies on Long-Term Offspring Health Outcomes

Published on: June 28, 2024

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Maternal Caffeine Consumption and Pregnancy Outcomes.

Jack E James1

  • 1Reykjavík University, Reykjavík, Iceland. jack@ru.is.

Advances in Experimental Medicine and Biology
|January 1, 2026
PubMed
Summary

Maternal caffeine intake is linked to serious negative pregnancy outcomes like miscarriage and stillbirth. Current guidelines suggesting moderate caffeine is safe are not supported by evidence; avoidance is recommended.

Keywords:
CaffeineLow birth weightMiscarriagePregnancy outcomesStillbirth

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Area of Science:

  • Obstetrics and Gynecology
  • Perinatal Medicine
  • Public Health

Background:

  • Caffeine is widely consumed by pregnant women despite lacking nutritional value.
  • Existing guidelines often permit moderate caffeine intake during pregnancy.
  • Concerns exist regarding caffeine's impact on fetal development and maternal health.

Purpose of the Study:

  • To review evidence associating maternal caffeine consumption with adverse pregnancy outcomes.
  • To evaluate the consistency of current advice with scientific findings.
  • To provide evidence-based recommendations for pregnant women.

Main Methods:

  • Focused narrative review of empirical studies, systematic reviews, and meta-analyses.
  • Analysis of associations between caffeine intake and various pregnancy outcomes.
  • Assessment of dose-response relationships and potential confounding factors.

Main Results:

  • Strong evidence links maternal caffeine intake to miscarriage, stillbirth, and low birth weight/small for gestational age.
  • Less robust evidence suggests associations with childhood leukemia, obesity, and developmental issues.
  • Preterm birth risk does not appear to be elevated; no safe consumption threshold identified.

Conclusions:

  • Maternal caffeine consumption is reliably associated with significant negative pregnancy and offspring outcomes.
  • Current recommendations allowing "moderate" caffeine intake are inconsistent with the evidence.
  • Pregnant women and those planning pregnancy should avoid caffeinated products.