THE INFLUENCE OF SOCIO-DEMOGRAPHIC FACTORS ON AGE AT MENARCHE IN NORTH BAČKA REGION (THE REPUBLIC OF SERBIA)

Objectives. Menarche occurrence is influenced by genetic and environmental or external factors. The influence of factors that affect age at menarche vary in different populations. Material methods. Anthropological survey was carried out primary secondary schools rural urban places North Bačka region Vojvodina (North part the Republic Serbia). investigation performed between 2017-2020, data used this study represents a from large comprehensive anthropological survey. included total 1971 adolescent girls aged 7 to 18 years, whom 514 (26.08%) had menarche. status quo method collect individual on following socio-economic demographic parameters were examined: parents’ educational level, number children family, participation sports activities outside school, settlement size nationality. Results. present showed average menarcheal 12.23 ± 1.18 years median equals 12.22 years. No relationship observed with regard Only statistical differences found. onset who practice some sport somewhat earlier than without any additional physical activity. Conclusions. shows last few decades there has been trend toward lowering Serbian girls. It also conditions seem be flattened places. Keywords: girls, menarche,