19] who found delay in menarcheal age of physically active girls than those who were not involved in any kind of physical stress.
A study on menarcheal age of school going girls at Jhalawar district, Rajasthan reported 222 girls attained menarche [less than or equal to] 13 years where as 131 girls attained menarche [greater than or equal to] 13 years  whereas, another study on Agra girls showed menarcheal age of 13.
Household environment and parents' level of education are also two crucial factors that determine menarcheal age.
Interestingly, decreased menarcheal age was independently correlated with decreased physical activity of adolescents, as well as with parents' having a limited educational status.
Menarcheal age in Turkey: Secular trend and socio-demographic correlates.
Secular trends in menarcheal age among Ghanaian women in Accra.
and growth pattern of Indian girls adopted in Sweden.
The relation of menarcheal age
to anthropometric profiles in korean girls.
Menarche had occurred with the mean menarcheal age being 12.
3 The variability involves genetic factors, as studies on heritability of menarcheal age indicate,4 although the molecular determinants remain unidentified.
So, the objectives of this study was to determine the menarcheal age
of school going girls.
, marriage and reproduction among Saudi women.