Findings on the average age at menarche among girls in selected districts and rural areas
- VernacularTitle:Охидын биеийн юм ирэх дундаж насыг зарим дүүрэг, орон нутагт судалсан дүн
- Author:
Zolboo B
1
;
2
;
Shiirevnyamba A
1
;
Mongonnavch E
2
;
Dulamsuren Ya
1
;
2
;
Nomin-Erdene Ts
2
;
Ankhmaa D
1
;
Myadagmaa J
1
Author Information
1. Department of Health Research, Graduate School, MNUMS
2. Department of Endocrinolgy, First Central Hospital
- Publication Type:Journal Article
- Keywords:
Average age at menarche, Population size
- From:
Mongolian Journal of Health Sciences
2025;89(5):45-47
- CountryMongolia
- Language:Mongolian
-
Abstract:
Background:The average age at menarche (AAM) among girls is influenced by various factors, including the
socioeconomic status of the country, geographical location, and anthropometric characteristics. In Mongolia, limited
research has been conducted on this topic
Aim:This study aimed to compare the mean age at menarche among girls living in Bayanzürkh District of Ulaanbaatar
and those in Uvs Province.
Materials and Methods:A cross-sectional study was conducted between April and June 2025. The study participants
included schoolgirls aged 8 years and older from general education schools located in Bayanzürkh District and Uvs
Province. Statistical analyses were performed using R version 4.5.1 (RStudio 2025.05.1-513)
Results:A total of 486 girls participated in the study. The mean age at menarche among the participants was 12.23±1.29
years. The mean age at menarche among girls aged 8–18 years in Bayanzürkh District was 11.84±1.19 years, while that
among girls aged 8–18 years in Uvs Province was 12.97±1.15 years. Thus, girls in Bayanzürkh District experienced
menarche 1.13 years earlier on average than those in Uvs Province. The difference in mean AAM between urban
(Ulaanbaatar) and rural (Uvs Province) girls was statistically significant (p<0.0001).
Conclusion:The mean age at menarche among girls residing in Bayanzürkh District was significantly lower than that of
girls living in Uvs Province, indicating a tendency toward earlier onset of menarche in urban areas.
- Full text:2025120912594416299Охидын биеийн юм ирэх дундаж насыг зарим дүүрэг, орон нутагт судалсан дүн.pdf
