Evidence map›Paper›PMID 30783211›Full record

SynthesisEuropean journal of clinical nutrition2019

A systematic literature review of the relation between iron status/anemia in pregnancy and offspring neurodevelopment.

Janet Janbek, Mahesh Sarki, Ina O Specht, Berit L Heitmann

Abstract readSystematic Review
PubMed Publisher
In one paragraph

Synthesis in European journal of clinical nutrition, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 47 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
47citing papers in PubMed, 4 pooled it
5.9field-weighted citation impact, top 3% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

47 citing papers in PubMed, 4 syntheses or guidelines pooled it, 77 citations in OpenAlex.

  1. Pooled it
  2. Daily oral iron supplementation during pregnancy.The Cochrane database of systematic reviews · 2024
    Pooled it
  3. Pooled it
  4. Pooled it
  5. Trial
  6. Trial
  7. Trial
  8. Cortisol Stress Response is Associated with Iron Status in Pregnancy.medRxiv : the preprint server for health sciences · 2026
    Article
  9. Article
  10. Review
  11. Article
  12. Article
  13. Article
  14. Article
  15. Observational
  16. Hematologic Complications of Pregnancy.European journal of haematology · 2025
    Review
  17. Article
  18. Prenatal Hemoglobin Concentration and Long-Term Child Neurocognitive Development.The American journal of tropical medicine and hygiene · 2025
    Article
  19. Article
  20. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

4 authors at 3 institutions in 1 country.

Janet JanbekThe Research Unit for Dietary Studies at The Parker Institute, Bispebjerg and Frederiksberg Hospital, part of the Copenhagen University Hospital, The Capital Region, Copenhagen, Denmark.
Mahesh SarkiThe Research Unit for Dietary Studies at The Parker Institute, Bispebjerg and Frederiksberg Hospital, part of the Copenhagen University Hospital, The Capital Region, Copenhagen, Denmark.
Ina O SpechtThe Research Unit for Dietary Studies at The Parker Institute, Bispebjerg and Frederiksberg Hospital, part of the Copenhagen University Hospital, The Capital Region, Copenhagen, Denmark.
Berit L HeitmannThe Research Unit for Dietary Studies at The Parker Institute, Bispebjerg and Frederiksberg Hospital, part of the Copenhagen University Hospital, The Capital Region, Copenhagen, Denmark. Berit.Lilienthal.Heitmann@regionh.dk.
Frederiksberg Hospital · DKCopenhagen University Hospital · DKUniversity of Copenhagen · DK

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThe fetal brain starts developing early and animal studies have suggested that iron plays several roles for the development, but results from epidemiological studies investigating associations between gestational iron and offspring neurodevelopment are inconsistent.

objectiveTo systematically examine results from observational studies and RCTs on gestational iron and offspring neurodevelopment, with focus on the importance of four domains: iron status indicators, exposure timing, neurodevelopmental outcomes, and offspring age.

methodsPRISMA guidelines were followed. Embase, PsychInfo, Scopus, and The Cochrane library were searched in September 2017 and February 2018. Overall, 3307 articles were identified and 108 retrieved for full-text assessment. Pre-specified eligibility criteria were used to select studies and 27 articles were included;19 observational and 8 RCTs.

resultsIron status in pregnancy was associated with offspring behavior, cognition, and academic achievement. The direction of associations with behavioral outcomes were unclear and the conclusions related to cognition and academic achievement were based on few studies, only. Little evidence was found for associations with motor development. Observed associations were shown to persist beyond infancy into adolescence, and results depended on iron status indicator type but not on the timing of exposure.

conclusionWe conclude that there is some evidence that low pregnancy iron, possibly particularly in the 3rd trimester, may be associated with adverse offspring neurodevelopment. As most previous research used Hemoglobin, inferring results to iron deficiency should be done with caution. No conclusions could be reached regarding associations beyond early childhood, and supplementation with iron during pregnancy did not seem to influence offspring neurodevelopment.

Indexed as

Anemia, Iron-DeficiencyIronPregnancy Complications, HematologicChild DevelopmentCognitionFemaleHemoglobinsHumansInfant BehaviorInfant, NewbornIron DeficienciesNutritional StatusPregnancyHemoglobinsIron

Identifiers

PMID30783211
OpenAlexW2915253870

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.