Evidence map›Paper›PMID 33479337›Full record

ArticleScientific reports2021

Post-conception heat exposure increases clinically unobserved pregnancy losses.

Tamás Hajdu, Gábor Hajdu

Open access · goldAbstract read
In one paragraph

Article in Scientific reports, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
15citing papers in PubMed, 1 pooled it
3.0field-weighted citation impact, top 9% 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

15 citing papers in PubMed, 1 synthesis or guideline pooled it, 41 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Using wearable devices to measure personal heat exposure in a preconception cohort.Journal of exposure science & environmental epidemiology · 2026
    Article
  4. Article
  5. Associations of climatic factors with pregnancy loss in Nicosia, Cyprus.Journal of exposure science & environmental epidemiology · 2025
    Article
  6. Article
  7. Review
  8. Article
  9. Article
  10. Article
  11. Review
  12. Article
  13. The Effect of Prenatal Exposure to Climate Anomaly on Adulthood Cognitive Function and Job Reputation.International journal of environmental research and public health · 2022
    Article
  14. Creating Logical Flow When Writing Scientific Articles.Journal of Korean medical science · 2021
    Review
  15. Reproduction is driven by seasonal environmental variation in an equatorial mammal, the banded mongoose (Behavioral ecology : official journal of the International Society for Behavioral Ecology
    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

2 authors at 2 institutions in 1 country.

Tamás HajduInstitute of Economics, Centre for Economic and Regional Studies, Budapest, Hungary. hajdu.tamas@krtk.mta.hu.
Gábor HajduInstitute for Sociology, Centre for Social Sciences, Budapest, Hungary.
Institute for Sociology · HUInstitute of Economics · HU

Funding

Hungarian National Research, Development and Innovation Office FK 124310"Lendület" programme of the Hungarian Academy of Sciences LP2018-2/2018
6 · The paper itself

Abstract

Evidence of the relationship between temperature during pregnancy and human embryo mortality is limited. Most importantly, the literature lacks causal estimations and studies on early pregnancy losses. Here, we estimate the impact of early pregnancy temperature exposure on the clinically unobserved pregnancy loss rate. We use administrative data of clinically observed pregnancies from more than three decades for Hungary. We apply an empirical approach that allows us to infer the impact of temperature on the clinically unobserved pregnancy loss rate from the estimated effects on the clinically observed conception rate. The results show that exposure to hot temperatures during the first few weeks after the conception week increases the clinically unobserved pregnancy loss rate, whereas exposure to colder temperatures seems to decrease it. Importantly, the temperature-induced changes represent changes in the total number of pregnancy losses rather than a compositional change between clinically observed and clinically unobserved pregnancy losses.

Indexed as

Abortion, SpontaneousAdultFemaleGestational AgeHot TemperatureHumansHungaryPregnancyPregnancy Rate

Identifiers

PMID33479337
PMCPMC7820015
OpenAlexW3122200146

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.