Relationship Between Age of Menarche and Regularity of Menstrual Cycle in Female Students At Mts Hasyim Asy'ari Lamongan

Abstract

Menarche marks the onset of reproductive hormonal maturation in adolescent girls. It plays an important role in regulating the menstrual cycle. This study analyzes the relationship between age at menarche and menstrual cycle regularity in female students. This study was conducted at MTs Hasyim Asy'ari, Kembangbahu District, Lamongan. The sample consisted of 38 female students who had experienced menarche, selected using simple random sampling. Data analysis used the Chi-Square test, with α=0.05. Most respondents (63.1%) had an ideal age at menarche (12-13 years), a small number (21%) had a younger age at menarche (less than 11 years old), and a small number (15.8%) were older (more than 13 years old). In addition, most had regular menstrual cycles (84.2%), and a small proportion had irregular cycles (15.8%). The results of the Chi-Square test showed a p-value of 0.005 (p<0.05), indicating a significant relationship between age at menarche and menstrual cycle regularity. Thus, age at menarche correlates with menstrual cycle regularity in adolescent girls. It indicates that the ideal age of menarche tends to have a positive effect on the menstrual cycle regularity.