
This research was carried out to determine the age at menarche of adolescent girls in Ado Ekitiand also to identify any decline in the average age at menarche over the years and if factors such as nutrition type, academic level and socioeconomic lifestyle of parents affect its’ onset. Three hundred and forty two (342) girls were randomly selected in both public and private Schools in Ado-Ekiti, Ekiti state using well structured and closed endedquestionaires. Some socio-economic variables were “measured” such as fathers and mothers educational level, occupation of father and mother, type of accommodation and nutritional type. Multivariate Regression Model was considered and fitted since the age at menarche was a continuous measurement. Backward elimination method was used to select the most parsimonious model. This study reveals that menarcheal age of adolescent girls in Ado Ekiti is 12.85 ± 0.0995 at 95% confidence interval (95% CI= 12.95-12.75) and also demonstrated a decline in the menarcheal age of adolescent girls. The study also reveals that father’s education, mother’s education, father’s occupation and nutritional type affect age at menarche.