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Who was studied 207,506 British ancestry individuals.
The effect
Each copy of the A allele shifted the measure 0.0185 kg lower (95% confidence interval 0.012-0.025); p = 6 × 10−9.
Where it sits Chromosome 10, band 10q23.33 — in an intron of CYP2C19.
What each result means
A/ATwo copies of the version the research linked to Birth weight (extremes removed). 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 Birth weight (extremes removed). That is a smaller link than two copies.
T/TNo copy of the version the research linked to Birth weight (extremes removed). This is the starting point the study compared everyone against.
rs138056307 is a single position in the genome, in or near the CYP2C19 gene. Published research associates it with birth weight (extremes removed). A single variant does not decide an outcome — it shifts a probability, and for most common variants the shift is small.
What conditions is rs138056307 linked to?
On MyGeneLog this position is linked to Birth Weight. The research behind each link, and its sources, are set out on that condition page.
Does rs138056307 affect how medicines work?
CYP2C19 carries pharmacogenomic findings for Brivaracetam, Clopidogrel, Proton pump inhibitors, Serotonin reuptake antidepressants, Voriconazole. That is educational information, not a prescription or a dosing guide. Any decision to start, stop or change a medicine belongs with the clinician or pharmacist managing your treatment.
Does having rs138056307 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 rs138056307 come from?
GWAS Catalog, Diabetologia 2025, PMID:40210729. Every variant on MyGeneLog comes from public primary sources and is published with its citation and the date it was checked.
0 22Reads by AI crawlersClaude0ChatGPT0Google · Gemini0Perplexity0Meta AI0Microsoft · Copilot0Amazon0Apple0China (ByteDance, Huawei, Baidu…)0Others2Total2Counted 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.
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