{{Rsnum
|rsid=2090409
|Chromosome=9
|position=106204807
|Orientation=minus
|GMAF=0.3669
|Assembly=GRCh38
|GenomeBuild=38.1
|dbSNPBuild=141
|geno1=(G;G)
|geno2=(G;T)
|geno3=(T;T)
}}{{ population diversity
| geno1=(G;G)
| geno2=(G;T)
| geno3=(T;T)
| CEU | 46.9 | 44.2 | 8.8
| HCB | 27.0 | 48.2 | 24.8
| JPT | 29.2 | 50.4 | 20.4
| YRI | 46.3 | 37.4 | 16.3
| ASW | 29.8 | 63.2 | 7.0
| CHB | 27.0 | 48.2 | 24.8
| CHD | 35.2 | 47.2 | 17.6
| GIH | 69.3 | 28.7 | 2.0
| LWK | 41.3 | 37.6 | 21.1
| MEX | 43.1 | 43.1 | 13.8
| MKK | 44.9 | 41.0 | 14.1
| TSI | 47.1 | 44.1 | 8.8
| HapMapRevision=28
}}[[rs2090409]] is a SNP from chromosomal region 9q31.2 showing the strongest association with age at [[menarche]] in a study of 17,500 Icelandic women.

Per copy carried of the [[rs2090409]](A) allele, age at menarche is delayed about 1 month.

{{PMID Auto GWAS
|PMID=19448620
|Trait=Menarche
|Title=Meta-analysis of genome-wide association data identifies two loci influencing age at menarche
|RiskAllele=A
|Pval=2E-9
|OR=0.10
|ORtxt=[0.06-0.14] years younger
|OA=1
}}

{{PMID Auto GWAS
|PMID=21102462
|Trait=None
|Title=Thirty new loci for age at menarche identified by a meta-analysis of genome-wide association studies
|RiskAllele=A
|Pval=2E-33
|OR=4.7000
|ORtxt=[3.92-5.48] week decrease
|OA=1
}}
{{omim
|id=612883
|rsnum=2090409
}}

{{GET Evidence
|impact=pathogenic
|qualified_impact=Insufficiently evaluated pathogenic
|inheritance=unknown
|quality_scores=Array
|dbsnp_id=rs2090409
|overall_frequency_n=43
|overall_frequency_d=116
|overall_frequency=0.37069
|n_genomes=33
|n_genomes_annotated=0
|n_haplomes=42
|n_articles=0
|n_articles_annotated=0
|in_gwas=Y
|autoscore=1
|webscore=N
}}

{{PMID Auto GWAS
  |PMID=23449627
  |Trait=Pubertal anthropometrics
  |Title=Genome-wide association and longitudinal analyses reveal genetic loci linking pubertal height growth, pubertal timing and childhood adiposity.
  |RiskAllele=C
  |Pval=2E-6
  |OR=.11
  |ORtxt=[0.065-0.155] unit increase
  }}

{{on chip | 23andMe v3}}
{{on chip | 23andMe v4}}
{{on chip | Illumina Human 1M}}