The age of menarche in Irish girls

Age at menarche in Ireland is analyzed using data from a representative sample of 2,940 girls aged 9 to 17 drawn from schools in Dublin, Dundalk, Navan, and Portlaoise, of whom some half were urban and half rural residents. The mean age at menarche was 13.52 years. The authors note that this is the latest mean age at menarche recorded for a contemporary European population. No significant differences in age at menarche by place of residence or social class were noted.