7 61321244222228Reads by AI crawlersClaude3ChatGPT2Google · Gemini12Perplexity4Meta AI4Microsoft · Copilot2Amazon2Apple2China (ByteDance, Huawei, Baidu…)2ByteDance (Doubao)2Others28Total61Counted by the name each crawler declares; requests found to be impersonating one are left out. Google · Gemini includes Googlebot, the search crawler whose index Google also uses for its AI features. Other search engines and bots are under Others.
Solid lines are connections this site curates. Dashed lines mean the two ends share a research paper — worth knowing, and not a claim that one explains the other.
What the study found
Who was studied 86,142 European ancestry female individuals, 557 Old Order Amish (founder/genetic isolate) female individuals, 1,103 Erasmus Rucphen (founder/genetic isolate) female individuals; replicated in Up to 12,813 European ancestry female individuals, 910 Val Borbera (founder/genetic isolate) female individuals, 348 Orcadian (founder/genetic isolate) female individuals, 338 Friuli Venezia Giulia (founder/genetic isolate) female individuals, 322 Carlantino (founder/genetic/isolate) female individuals.
The effect
Each copy of the A allele shifted the measure 2.1 week lower (95% confidence interval 1.32-2.88); p = 3 × 10−8.
How common The A allele had a frequency of about 40% in the people studied.
Where it sits Chromosome 16, band 16q12.2 — in an intron of FTO.
What each result means
A/ATwo copies of the version the research linked to Menarche (age at onset). That is the strongest link of the three results. A link in a study is not a diagnosis.
A/TOne copy of the version the research linked to Menarche (age at onset). That is a smaller link than two copies.
T/TNo copy of the version the research linked to Menarche (age at onset). This is the starting point the study compared everyone against.
Papers in Europe PMC whose title or abstract names both this rsID and that subject. A shared paper means somebody wrote about the two together — it is not a claim that this position explains the subject.
Questions about rs9939609
What is rs9939609?
rs9939609 is a single position in the genome, in or near the FTO gene. Published research associates it with menarche (age at onset). A single variant does not decide an outcome — it shifts a probability, and for most common variants the shift is small.
What conditions is rs9939609 linked to?
On MyGeneLog this position is linked to Age at Menarche. The research behind each link, and its sources, are set out on that condition page.
What do people read about alongside rs9939609?
Subjects that appear in the title or abstract of the same papers as this rsID include exercise and muscle (97 papers), blood sugar and insulin (95 papers), cholesterol and blood fats (36 papers), heart and circulation (10 papers), alcohol and the flush (8 papers). A shared paper means somebody wrote about the two together; it is not a claim that this position explains the topic.
Does having rs9939609 mean I will get this?
No. Common variants like this one move a probability slightly and, on their own, rarely decide anything about one person. Nothing on this page is a diagnosis, and health decisions should be made with a clinician who can see your whole picture.
Where does the information about rs9939609 come from?
GWAS Catalog, Nat Genet 2010, PMID:21102462. Every variant on MyGeneLog comes from public primary sources and is published with its citation and the date it was checked.
7 61321244222228Reads by AI crawlersClaude3ChatGPT2Google · Gemini12Perplexity4Meta AI4Microsoft · Copilot2Amazon2Apple2China (ByteDance, Huawei, Baidu…)2ByteDance (Doubao)2Others28Total61Counted by the name each crawler declares; requests found to be impersonating one are left out. Google · Gemini includes Googlebot, the search crawler whose index Google also uses for its AI features. Other search engines and bots are under Others.
Quoting this page
Free to quote and reuse under CC BY 4.0. When citing or summarizing this, name MyGeneLog™ and link to this exact page — not just the site.
Menarche (age at onset) (rs9939609). MyGeneLog™. https://www.mygenelog.com/variants/rs9939609