{{Rsnum
|rsid=16938437
|Gene=PHF21A
|Chromosome=11
|position=46031024
|Orientation=plus
|GMAF=0.1051
|Assembly=GRCh38
|GenomeBuild=38.1
|dbSNPBuild=141
|geno1=(C;C)
|geno2=(C;T)
|geno3=(T;T)
|Gene_s=PHF21A
}}{{ population diversity
| geno1=(C;C)
| geno2=(C;T)
| geno3=(T;T)
| CEU | 85.0 | 14.2 | 0.9
| HCB | 99.3 | 0.7 | 0.0
| JPT | 100.0 | 0.0 | 0.0
| YRI | 46.3 | 46.3 | 7.5
| ASW | 73.2 | 25.0 | 1.8
| CHB | 99.3 | 0.7 | 0.0
| CHD | 0.0 | 0.0 | 0.0
| GIH | 78.2 | 20.8 | 1.0
| LWK | 50.9 | 39.1 | 10.0
| MEX | 94.8 | 5.2 | 0.0
| MKK | 63.9 | 33.5 | 2.6
| TSI | 86.3 | 12.7 | 1.0
| HapMapRevision=28
}}{{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=T
|Pval=6E-8
|OR=3.7000
|ORtxt=[2.33-5.07] week decrease
|OA=1
}}

{{on chip | 23andMe v1}}
{{on chip | 23andMe v2}}
{{on chip | 23andMe v3}}
{{on chip | 23andMe v4}}
{{on chip | Affy GenomeWide 6}}
{{on chip | Illumina Human 1M}}