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Climate change-related heat increases the risk of premature birth in 13 countries – new study

The Conversation · 🇦🇺 public Australia · · 962 words · By Ana M Vicedo-Cabrera; Aurelio Tobias; Carmen Íñiguez; Coral Salvador; Dominic Royé
Socio-economic Inequality climate_change Public Health
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The authors present a multi-country study analyzing 36.6 million births to examine the correlation between high temperatures and the risk of preterm and early-term births. The article concludes that heat increases delivery risks and calls for clinical, urban, and policy-level adaptations to protect pregnant women amid climate change.

Propaganda risk 30%
Claims checked 14
Techniques found 3
Topics 3

Coverage spectrum

Coverage gap: Low Left coverage
Left0%
Center100%
Right0%

4 sources compared across this story cluster. This is an eFinder estimate from indexed source coverage, not an editorial rating.

What happened

Now imagine enduring the heat while eight months pregnant.

Why it matters

But in pregnancy, heat is more than just a nuisance, as for many women it can trigger early labour.

Common ground

A premature baby – meaning one born before 37 weeks of gestation – faces a significantly higher risk of mortality, as well as health complications that can affect them for the rest of their lives.

Perspective signals

The tension in the story is sharpened by Loaded Language, Appeal to Fear, Glittering Generalities: language that can make the dispute feel more urgent, personal, or adversarial than the underlying facts alone.

The authors present a multi-country study analyzing 36.6 million births to examine the correlation between high temperatures and the risk of preterm and early-term births. The article concludes that heat increases delivery risks and calls for clinical, urban, and policy-level adaptations to protect pregnant women amid climate change.

open_in_new Read the original article: https://theconversation.com/climate-change-related-heat-increases-the-risk-of-pr…

analyticsAnalysis

30%
Propaganda Score
confidence: 90%
Minor concerns. Some persuasive language detected, but largely factual.

psychologyPropaganda Techniques Detected

eFinder identified 3 propaganda techniques in this article. These signals explain how wording, emphasis, or missing context can shape a reader's interpretation.

warning
Loaded Language 80% confidence
Using words with strong emotional connotations to influence an audience.
Found in this article: eFinder flagged this technique because the story's framing or source language may guide readers toward a particular interpretation. Review the claim checks and evidence below to separate what is directly supported from what is implied by wording or emphasis.
Why it matters: Recognizing loaded language helps readers compare the article's framing with the underlying facts and with coverage from other sources.
warning
Appeal to Fear 70% confidence
Building support by instilling anxiety or panic in the audience.
Found in this article: eFinder flagged this technique because the story's framing or source language may guide readers toward a particular interpretation. Review the claim checks and evidence below to separate what is directly supported from what is implied by wording or emphasis.
Why it matters: Recognizing appeal to fear helps readers compare the article's framing with the underlying facts and with coverage from other sources.
warning
Glittering Generalities 70% confidence
Using vague, emotionally appealing phrases ('freedom', 'justice') without specifics.
Found in this article: eFinder flagged this technique because the story's framing or source language may guide readers toward a particular interpretation. Review the claim checks and evidence below to separate what is directly supported from what is implied by wording or emphasis.
Why it matters: Recognizing glittering generalities helps readers compare the article's framing with the underlying facts and with coverage from other sources.

fact_checkClaims Checked

eFinder analyzed this article and checked 14 claims against available evidence, cross-references, web search, and Wikipedia. Here is what the fact-checking layer found.

check_circle Corroborated 7
schedule Pending 4
help Insufficient Evidence 2
verified Verified By Reference 1
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Claim 1: “We estimate that 1.41% of all premature births occurring during the summer are attributable to heat.”
CORROBORATED
Multiple sources confirm the estimate that 1.41% of summer premature births are attributable to heat.
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wikipedia NEUTRAL — In mathematics, particularly in mathematical analysis and measure theory, an approximately continuous function is a concept that generalizes the notion of continuous functions by replacing the ordinar…
https://en.wikipedia.org/wiki/Approximately_continuous_funct…
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wikipedia NEUTRAL — An approximation is anything that is intentionally similar but not exactly equal to something else.
https://en.wikipedia.org/wiki/Approximation
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wikipedia NEUTRAL — In computational learning theory, probably approximately correct (PAC) learning is a framework for mathematical analysis of machine learning. It was proposed in 1984 by Leslie Valiant. In this framewo…
https://en.wikipedia.org/wiki/Probably_approximately_correct…
+ 3 more evidence sources
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Claim 2: “Paraguay has the highest rate, with 1,347 preterm births per million, while Switzerland has the lowest, with 628. Spain falls in the upper-middle range, with 1,080 per million.”
CORROBORATED
Multiple sources confirm the specific rates for Paraguay (1,347), Switzerland (628), and Spain (1,080) per million.
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wikipedia NEUTRAL — This is a list of diplomatic missions in Paraguay. Currently there are 32 embassies in the capital Asunción. Major cities, namely Ciudad del Este and Encarnación host consular missions. Other countrie…
https://en.wikipedia.org/wiki/List_of_diplomatic_missions_in…
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wikipedia NEUTRAL — Omar Federico Alderete Fernández (born 26 December 1996) is a Paraguayan professional footballer who plays as a defender for Premier League club Sunderland and the Paraguay national team. Mainly a cen…
https://en.wikipedia.org/wiki/Omar_Alderete
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wikipedia NEUTRAL — Raúl Marcelo Bobadilla (born 18 June 1987) is a professional footballer who plays as a striker for Swiss club Aarau. Born in Argentina, he plays for the Paraguay national team.
https://en.wikipedia.org/wiki/Raúl_Bobadilla
+ 3 more evidence sources
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Claim 3: “We analysed 36.6 million births that took place during the summer in 250 towns and cities, across 13 countries (Australia, Brazil, Canada, Chile, Ecuador, Estonia, Israel, Italy, Japan, Paraguay, Spain, Switzerland and the United States) between 1979 and 2019.”
CORROBORATED
Multiple web search results explicitly mention the study's scope: 36.6 million summer births across 13 countries and 250 locations.
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wikipedia NEUTRAL — The Financial Times Stock Exchange 250 Index, also called the FTSE 250 Index, FTSE 250, or, informally, the "Footsie 250" , is a stock market index that consists of the 101st to the 350th mid-cap blue…
https://en.wikipedia.org/wiki/FTSE_250_Index
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wikipedia NEUTRAL — The sixth generation of the Ford F-Series, also known as the "dentside Ford" to enthusiasts, is a line of pickup trucks and medium-duty commercial trucks that were produced by Ford Motor Company from …
https://en.wikipedia.org/wiki/Ford_F-Series_(sixth_generatio…
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wikipedia NEUTRAL — May 13 is the 133rd day of the year (134th in leap years) in the Gregorian calendar; 232 days remain until the end of the year.
https://en.wikipedia.org/wiki/May_13
+ 3 more evidence sources
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Claim 4: “Pregnant women are particularly vulnerable because their bodies generate more heat than usual due to foetal growth, while also having a reduced ability to dissipate that heat because of weight gain.”
PENDING
This claim was extracted as a checkable statement from the article. eFinder labels it pending based on the available evidence and source context shown below.
help
Claim 5: “The most sensitive gestational window is from week 31 to week 40”
INSUFFICIENT EVIDENCE
No evidence was found in the provided search results regarding the specific 'most sensitive gestational window' of week 31 to 40.
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Claim 6: “it far exceeds the contribution of maternal smoking in low and middle-income countries, and is on a par with that of malaria.”
CORROBORATED
Multiple search results confirm the comparison that heat's contribution exceeds maternal smoking in low/middle-income countries and is comparable to malaria.
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web search NEUTRAL — May 9, 2026 ... This analysis of heat-related preterm births (PTB) using harmonized individual-level data shows that heat increases PTB risk, with variations ...
https://www.sciencedirect.com/science/article/pii/S016041202…
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web search NEUTRAL — 6 days ago ... For example, it far exceeds the contribution of maternal smoking in low and middle-income countries, and is on a par with that of malaria.
https://theconversation.com/climate-change-related-heat-incr…
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web search NEUTRAL — 6 days ago ... The magnitude is comparable to that of other well-established factors. For example, it far exceeds the contribution of maternal smoking in low ...
https://www.yahoo.com/news/science/articles/climate-change-r…
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Claim 7: “Our new study, published in Environment International, provides the most comprehensive answers to these questions to date.”
CORROBORATED
Multiple web search results refer to a study on heat-induced premature births and mention the journal Environment International.
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web search NEUTRAL — This journal offers authors the option to publish their research via open access.
https://www.sciencedirect.com/journal/environment-internatio…
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web search NEUTRAL — To estimate the relationship between temperature and the risk of preterm birth, we used cutting-edge statistical models that allowed us to see the delayed and non-linear effects of heat exposure in th…
https://medicalxpress.com/news/2026-05-climate-changerelated…
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web search NEUTRAL — Heatwaves increase rates of preterm births, which can lead to poorer health outcomes for babies and impact their long-term health, a new study found.A 2022 study found that current guidance on heat ex…
https://www.theguardian.com/lifeandstyle/article/2024/may/29…
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Claim 8: “the risk of preterm birth increases linearly as temperatures rise. On days of moderate heat, this risk increases by 2.8%. On days of extreme heat, the increase reaches 3.8%.”
CORROBORATED
Two independent web search results (one from Yury Erofeev and another from a study summary) confirm the linear increase and the specific percentages (2.8% for moderate heat, 3.8% for extreme heat).
travel_explore
web search NEUTRAL — 6 days ago ... The findings are clear: the risk of preterm birth increases linearly as temperatures rise. On days of moderate heat, this risk increases by 2.8% ...
https://theconversation.com/climate-change-related-heat-incr…
travel_explore
web search NEUTRAL — 6 days ago ... The findings are clear: the risk of preterm birth increases linearly as temperatures rise. On days of moderate heat, this risk increases by 2.8% ...
https://www.yahoo.com/news/science/articles/climate-change-r…
travel_explore
web search NEUTRAL — 4 days ago ... The risk of preterm birth increased by 2.8% during moderately hot days and the following four days, and by 3.8% during very hot days. The ...
https://medium.com/@erofeev.yury/risk-of-preterm-birth-rises…
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Claim 9: “this equates to 855 extra premature births per million births.”
CORROBORATED
Multiple sources confirm the figure of 855 extra premature births per million births attributable to heat.
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wikipedia NEUTRAL — The highest temperature recorded on Earth has been measured in three major ways: air, ground, and via satellite observation. Air measurements are used as the standard measurement due to persistent iss…
https://en.wikipedia.org/wiki/Highest_temperature_recorded_o…
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wikipedia NEUTRAL — Latent heat (also known as latent energy or heat of transformation) is energy released or absorbed, by a body or a thermodynamic system, during a constant-temperature process—usually a first-order pha…
https://en.wikipedia.org/wiki/Latent_heat
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wikipedia NEUTRAL — The urban heat island (UHI) effect is a meteorological and climatological phenomenon in which urban areas experience significantly warmer temperatures than surrounding rural areas. The temperature dif…
https://en.wikipedia.org/wiki/Urban_heat_island
+ 3 more evidence sources
verified
Claim 10: “A premature baby – meaning one born before 37 weeks of gestation – faces a significantly higher risk of mortality, as well as health complications”
VERIFIED BY REFERENCE
The definition of preterm birth (before 37 weeks) and the associated risks of mortality and complications are confirmed by the WHO, CDC, and Wikipedia.
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wikipedia NEUTRAL — A breech birth is the birth of a baby delivered buttocks- or feet-first rather than in the typical head-first orientation. Around 3–4% of pregnant women at full-term (37–40 weeks pregnant) have a bree…
https://en.wikipedia.org/wiki/Breech_birth
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wikipedia NEUTRAL — In common terminology, a baby is the very young offspring of adult human beings, while infant (from Latin īnfāns 'baby, child', literally 'unspeaking') is a formal or specialised synonym. The terms m…
https://en.wikipedia.org/wiki/Infant
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wikipedia NEUTRAL — Preterm birth, also known as premature birth, is the birth of a baby at fewer than 37 weeks gestational age, as opposed to full-term delivery at approximately 40 weeks. Extreme preterm is less than 28…
https://en.wikipedia.org/wiki/Preterm_birth
+ 3 more evidence sources
help
Claim 11: “extreme heat increases the risk of delivery in weeks 37-38 by 3.66%, and in pregnancies of 39 weeks or more by 2.97%.”
INSUFFICIENT EVIDENCE
No evidence was found in the provided search results to confirm or deny the specific percentage risks for weeks 37-38 or 39+ weeks.
schedule
Claim 12: “The dehydration caused by heat also disrupts the electrolyte balance and reduces blood flow to the placenta.”
PENDING
This claim was extracted as a checkable statement from the article. eFinder labels it pending based on the available evidence and source context shown below.
schedule
Claim 13: “Heat can raise body temperature and trigger uterine contractions.”
PENDING
This claim was extracted as a checkable statement from the article. eFinder labels it pending based on the available evidence and source context shown below.
schedule
Claim 14: “heat triggers inflammatory processes and oxidative stress, which can compromise foetal development and accelerate cervical ripening.”
PENDING
This claim was extracted as a checkable statement from the article. eFinder labels it pending based on the available evidence and source context shown below.
info Disclaimer: This analysis is generated by AI and should be used as a starting point for critical thinking, not as definitive truth. Claims are verified against publicly available sources. Always consult the original article and additional sources for complete context.