 This study found that irregular menstrual cycles were associated with a higher risk of type 2 diabetes mellitus in women of childbearing age. Women with irregular menstrual cycles were more likely to have a higher body mass index, BMI, waist-to-hip ratio, and lower diet quality and physical activity levels than women with regular menstrual cycles. These findings suggest that irregular menstrual cycles may be a risk factor for type 2 diabetes mellitus in women of childbearing age. This article was authored by DHA Agestia, Nirmasari, Wittea Studi, Martha Ardi area, and others.