fullscreen

eFinder

eFinder

Home › Article

Older or younger sibling? Birth order may affect health later in life

EuroNews · 🇫🇷 public France · · 319 words · By Marta Iraola Iribarren
headphones Listen to the eFinder podcast briefing
Generate a natural audio summary of this story
Daily briefing

What to know about Older or younger sibling? Birth order may affect health later in life

The order in which children are born may shape their risk of developing dozens of diseases, from autism and allergies to substance abuse.

Claims checked 6
Techniques found 0
Topics 0

Coverage spectrum

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

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

What happened

The order in which children are born may shape their risk of developing dozens of diseases, from autism and allergies to substance abuse.

Why it matters

Can the order in which kids are born determine a higher or lower risk of developing certain conditions?

Common ground

Birth order is associated with disease risk more broadly than previously recognised, a new study has found.

Perspective signals

No major persuasion pattern has been attached yet, so the source, headline, and evidence should carry most of the weight for readers.

open_in_new Read the original article: https://www.euronews.com/health/2026/08/06/older-or-younger-sibling-birth-order-…

fact_checkClaims Checked

eFinder analyzed this article and checked 6 claims against available evidence, cross-references, web search, and Wikipedia. Here is what the fact-checking layer found.

check_circle Corroborated 4
info Single Source 2
check_circle
Claim 1: “The researchers analysed data from over 10 million individuals in two-child families, and identified significant associations for 150 diseases, ranging from psychiatric disorders to digestive issues.”
CORROBORATED
Multiple independent news sources (BGNES and Euronews) explicitly state that researchers analyzed data from over 10 million individuals in two-child families and found associations for 150 diseases.
menu_book
wikipedia NEUTRAL — Parliamentary elections were held in Slovakia on 29 February 2020 to elect all 150 members of the National Council. The populist Ordinary People and Independent Personalities–NOVA–Christian Union–Chan…
https://en.wikipedia.org/wiki/2020_Slovak_parliamentary_elec…
menu_book
wikipedia NEUTRAL — El Copey is a town and municipality in the Colombian Department of Cesar, in the northeast of Colombia. It is 105 km away from the capital of the department, Valledupar.
https://en.wikipedia.org/wiki/El_Copey
menu_book
wikipedia NEUTRAL — Ouéndé-Kénéma is a town and sub-prefecture in the Guéckédou Prefecture in the Nzérékoré Region of south-western Guinea, near the border of Liberia.
https://en.wikipedia.org/wiki/Ouéndé-Kénéma
+ 3 more evidence sources
check_circle
Claim 2: “The findings, published in the journal Nature Health, reveal that first-born children are more likely to face neurodevelopmental challenges like autism and ADHD, as well as immune-related allergies.”
CORROBORATED
The claim that first-borns have a higher risk of autism, ADHD, and immune-related allergies is corroborated by multiple sources, including a specific report on birth order and disease risk.
menu_book
wikipedia NEUTRAL — Attention deficit hyperactivity disorder (ADHD) is a neurodevelopmental disorder characterised by symptoms of inattention, hyperactivity, impulsivity, and emotional dysregulation that are excessive an…
https://en.wikipedia.org/wiki/Attention_deficit_hyperactivit…
menu_book
wikipedia NEUTRAL — Despite the scientifically well-established nature of attention deficit hyperactivity disorder (ADHD), its diagnosis, and its treatment, each of these has been controversial since the 1970s. The contr…
https://en.wikipedia.org/wiki/Attention_deficit_hyperactivit…
menu_book
wikipedia NEUTRAL — Researchers in psychology, sociology, anthropology, and medicine have studied the relationship between digital media use and mental health since the mid-1990s, following the rise of the internet and m…
https://en.wikipedia.org/wiki/Digital_media_use_and_mental_h…
+ 3 more evidence sources
info
Claim 3: “The study also found that the protective effect for younger siblings is stronger when the age gap between siblings is smaller, reinforcing the idea of direct microbial sharing.”
SINGLE SOURCE
The provided evidence for claim 5 consists of advertisements and login pages for 'Protective Life' insurance, which are completely irrelevant to the medical study on birth order and microbial sharing.
travel_explore
web search NEUTRAL — Protect your future with a life insurance policy or annuity from Protective. Discover options that give you and your family confidence for what's ahead.
https://www.protective.com/
travel_explore
web search NEUTRAL — Protective and Protective Life refers to Protective Life Insurance Company (PLICO), founded in 1907, located in Omaha, NE, and its affiliates, including Protective Life and Annuity Insurance Company (…
https://myaccount.protective.com/login
travel_explore
web search NEUTRAL — The Protective logo and tradmarks are owned by Protective Life Insurance Company. When you visit Protective's websites, we may collect personal information from you via your browser or device, or thro…
https://www.connect.protective.com/main/home
info
Claim 4: “Younger siblings, on the other hand, showed a higher susceptibility to substance abuse, gastrointestinal problems, and certain infectious diseases like herpes zoster.”
SINGLE SOURCE
The specific claim regarding younger siblings' susceptibility to substance abuse, gastrointestinal problems, and herpes zoster is explicitly reported by Euronews. Other sources mention substance abuse and digestive issues generally, but Euronews is the only one linking it specifically to herpes zoster in this context.
travel_explore
web search NEUTRAL — Younger siblings, on the other hand, showed a higher susceptibility to substance abuse, gastrointestinal problems, and certain infectious diseases like herpes zoster.
https://www.euronews.com/health/2026/08/06/older-or-younger-…
travel_explore
web search NEUTRAL — Herpes zoster (HZ), commonly known as shingles, is typically associated with advancing age and immunocompromised states.By identifying high-risk groups beyond traditional age thresholds, it opens the …
https://medicaldialogues.in/medicine/news/younger-adults-wit…
travel_explore
web search NEUTRAL — “Notably, this may just reflect that young people overall have a low risk for HZ and so just a few more added cases due to the added risk with AD gives a higher hazard ratio as compared to older peopl…
https://www.medscape.com/viewarticle/new-evidence-links-atop…
check_circle
Claim 5: “They were also found to have higher odds of Tourette syndrome — a nervous system condition that begins in childhood — and obsessive-compulsive disorder (OCD), along with acne and asthma.”
CORROBORATED
The specific association of first-borns with Tourette syndrome, OCD, acne, and asthma is confirmed by the source 'Being First or Second Born Could Determine What Diseases You...'. While only one specific source lists all four, the general trend of neurodevelopmental and allergic risks for first-borns is corroborated across other results.
travel_explore
web search NEUTRAL — Obsessive–compulsive disorder is a mental disorder in which an individual has intrusive thoughts and feels the need to perform certain behaviors repeatedly to relieve the distress caused by the obsess…
https://en.wikipedia.org/wiki/Obsessive–compulsive_disorder
travel_explore
web search NEUTRAL — Researchers found first-born children were more likely than their younger siblings to be diagnosed with autism, ADHD, Tourette's syndrome and obsessive-compulsive disorder. Higher risks were also obse…
https://www.newsweek.com/being-first-or-second-born-could-de…
travel_explore
web search NEUTRAL — OCD and Tourette Syndrome: Re-examining the Relationship. by Charles S. Mansueto, PhD. This article was initially published in the Winter 2008 edition of the OCD Newsletter.
https://iocdf.org/expert-opinions/ocd-and-tourette-syndrome/
check_circle
Claim 6: “For immune-allergic and respiratory conditions such as hay fever, eczema, and asthma, the study noted that first-borns carry an excess risk because they lack the early microbial exposure that their younger siblings receive.”
CORROBORATED
The link between first-borns, respiratory/allergic conditions, and the lack of early microbial exposure (hygiene hypothesis) is supported by the 'Birth Order Linked to Disease Risk' source and the 'Breast-feeding and risk of asthma' source which explains the mechanism of microbial exposure.
travel_explore
web search NEUTRAL — The increased risk for substance abuse among second-borns is often attributed to sociological factors, such as the modelling of an older sibling’s behavior or a natural tendency for later-born childre…
https://www.euronews.com/health/2026/08/06/older-or-younger-…
travel_explore
web search NEUTRAL — The decreased odds for hay fever are in line with the “hygiene hypothesis,” which suggests that a lack of endemic infections increases the risk of being diagnosed with allergies due to a lack of early…
https://www.jacionline.org/article/S0091-6749(17)31750-5/ful…
travel_explore
web search NEUTRAL — First-born children face higher odds of neurodevelopmental and immune-allergic disorders, while second-born siblings show increased susceptibility to digestive and substance abuse issues. Whenever a n…
https://time.news/birth-order-linked-to-disease-risk-in-stud…
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.