Background: Menarche is a crucial sign of female reproductive maturity that is influenced by body composition, nutritional condition, and socio-environmental variables. Menarcheal age and menstrual features variations are significant indicators of adolescent health, especially in communities that are changing rapidly.
Objectives: The study aims to measure menarche age and menstrual health characteristics, investigate the relationship between menarcheal age and anthropometric indicators (BMI, WHR, and WC) and assess the effects of menarcheal timing and these indicators on menstrual outcomes.
 Methods: A cross-sectional study is conducted among 200 post-menarcheal adolescent girls of North 24 Parganas, West Bengal. A standardized questionnaire is used to gather information on age at menarche, menstrual flow, pain intensity and monthly regularity. All anthropometric measure are taken using standardized technique.
Results: The mean age at menarche is 11.75 ± 1.29 years. The majority of girls experienced moderate to severe discomfort (66%), moderate flow (71%), and regular cycles (68.5%). Menarcheal age is significantly correlated negatively with WC and BMI, but not with WHR. There is no correlation with earlier pain or cycle regularity. There is a strong correlation between menstrual flow and early menarche, with heavier flow being linked to earlier menarche.
Conclusion: The study reveals significant differences in menstrual health with respect to body composition and menarcheal timing among adolescent girls. Early menarche is linked to increased adiposity and heavier menstrual flow while other menstrual outcomes show minimal relationships, underscoring the need for early nutritional and reproductive health intervention during adolescence.