<![CDATA[Menstrual cycle regularity is an important indicator of adolescent reproductive health and may be influenced by nutritional status. This study aimed to determine the relationship between nutritional status and menstrual cycle among adolescent girls at MTs Putri PUI Majalengka in 2026. This quantitative analytical study used a cross-sectional design. The population consisted of 154 female students, with 60 respondents selected through proportionate stratified random sampling. Nutritional status was assessed using body weight and height measurements and classified according to Body Mass Index-for-Age (BMI/A) based on the 2020 Indonesian Ministry of Health anthropometric standards. Menstrual cycle data were obtained using a menstrual diary questionnaire and classified according to adolescent menstrual-cycle criteria. Data were analyzed using frequency distributions and Chi-Square testing at α=0.05. Of 60 respondents, 38 (63.3%) had normal nutritional status, while 22 (36.7%) had non-normal status. Forty respondents (66.7%) had regular menstrual cycles and 20 (33.3%) had irregular cycles. Among respondents with normal nutritional status, 35 (92.1%) had regular cycles, whereas among those with non-normal nutritional status, 17 (77.3%) had irregular cycles. The Chi-Square test yielded p=0.000 (p<0.05), indicating a significant relationship between nutritional status and menstrual cycle. Schools should strengthen nutritional education, periodic anthropometric monitoring, reproductive-health counseling, and menstrual-cycle recording.]]>
