<![CDATA[Menarche is a crucial phase in the reproductive development of adolescent girls, often accompanied by anxiety and psychological unpreparedness due to a lack of adequate information and education. Peer education is an effective approach to improving adolescents' understanding and emotional readiness for their first menstruation. This study aims to analyze the influence of peer education on psychological readiness for menarche among female students in the Ibu Community Health Center (Puskesmas Ibu) in West Halmahera Regency. The study used a quasi-experimental design with a one-group pretest–posttest approach. The sample consisted of 30 pre-menarcheal female students selected using a purposive sampling technique. The research instrument was a psychological readiness questionnaire that had been tested for validity and reliability. The results showed an increase in psychological readiness scores from an average pretest of 7.03 to 11.20 in the posttest. A total of 86.7% of respondents experienced an increase in readiness, while 13.3% remained stable, and none experienced a decrease. The Wilcoxon test showed a p-value <0.05, indicating a significant influence of peer education on psychological readiness for menarche. This study concludes that peer education is an effective, affordable, and relevant educational strategy to improve the psychological readiness of adolescent girls in facing menarche, especially in areas with limited access to reproductive information.]]>
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