Evidence map›Paper›PMID 34964492›Full record

ArticlePaediatric and perinatal epidemiology2022

Maternal early-pregnancy ferritin and offspring neurodevelopment: A prospective cohort study from gestation to school age.

Sara Sammallahti, Henning Tiemeier, Irwin K M Reiss, Martina U Muckenthaler, Hanan El Marroun, Marijn Vermeulen

Abstract read
In one paragraph

Article in Paediatric and perinatal epidemiology, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
11citing papers in PubMed, 2 pooled it
–field-weighted citation impact
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

11 citing papers in PubMed, 2 syntheses or guidelines pooled it.

  1. Pooled it
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  5. Iron and Pregnancy.Advances in experimental medicine and biology · 2025
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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

6 authors.

Sara SammallahtiDepartment of Child and Adolescent Psychiatry/Psychology, Erasmus MC, Sophia Children's Hospital, Rotterdam, Netherlands.ORCID 0000-0001-8928-000X
Henning TiemeierDepartment of Child and Adolescent Psychiatry/Psychology, Erasmus MC, Sophia Children's Hospital, Rotterdam, Netherlands.
Irwin K M ReissDepartment of Pediatrics, Division of Neonatology, Erasmus MC, Sophia Children's Hospital, Rotterdam, Netherlands.
Martina U MuckenthalerDepartment of Pediatric Oncology, Hematology & Immunology, University Hospital Heidelberg, Heidelberg, Germany.
Hanan El MarrounDepartment of Child and Adolescent Psychiatry/Psychology, Erasmus MC, Sophia Children's Hospital, Rotterdam, Netherlands.
Marijn VermeulenDepartment of Pediatrics, Division of Neonatology, Erasmus MC, Sophia Children's Hospital, Rotterdam, Netherlands.ORCID 0000-0001-9686-8186

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundIron plays a role in many key processes in the developing brain. During pregnancy, iron supplementation is widely recommended to prevent and treat iron deficiency; however, the prevalence of iron deficiency and the risk of iron overload vary greatly between populations. Evidence on the role of high levels of maternal ferritin, a storage iron marker during pregnancy in relation to offspring neurodevelopment is lacking.

objectiveOur main objective was to examine if maternal ferritin levels during pregnancy are associated with child cognitive and motor abilities.

methodsWe included Dutch mother-child dyads from the prospective population-based Generation R Study, born in 2002-2006. We compared children whose mothers had high (standard deviation score >+1) or low (standard deviation score <-1) early-pregnancy ferritin to children whose mothers had intermediate ferritin (reference group) using linear regression. Children underwent non-verbal intelligence and language tests at 4-9 years (cognitive abilities), finger-tapping and balancing tests at 8-12 years (motor abilities), and structural magnetic resonance imaging at 8-12 years (brain morphology). Covariates were child age, sex, maternal intelligence quotient estimate, age, body-mass-index, education, parity, smoking and alcohol use.

resultsOf the 2479 mother-child dyads with data on maternal ferritin and at least one child neurodevelopmental outcome, 387 mothers had low (mean = 20.6 µg/L), 1700 intermediate (mean = 64.6 µg/L) and 392 high (mean = 170.3 µg/L) early-pregnancy ferritin. High maternal ferritin was associated with 2.54 points (95% confidence interval -4.16, -0.92) lower child intelligence quotient and 16.02 cm

conclusionHigh maternal ferritin during pregnancy was associated with poorer child cognitive abilities and smaller brain volume. Maternal iron status during pregnancy may be associated with offspring neurodevelopment.

Indexed as

FerritinsIron DeficienciesAdultFemaleHumansIntelligenceIronPregnancyProspective StudiesYoung AdultFerritinsIronbrainferritinintelligenceironmotor skillspregnancy

Identifiers

PMID34964492
PMCPMC9306570

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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.