Abstract: Aims] Muscular strength has been reported to be highest in the ovulation phase compared to other menstrual cycle phases.However, the effect of menstrual cycle phase on more dynamic performance involving power, such as jump height, remains to be seen.This study investigated the change in muscular performance including both static (grip strength) and dynamic power tasks (squat jump and counter-movement jump) across the menstrual cycle.[Methods] Thirteen collegiate female athletes participated in this study.Based on the basal body temperature (3 months) and the level of luteinizing hormone (LH) in the urine (2 month), the timing of 1) menstrual, 2) follicular, 3) ovulation and 4) luteal phases were determined per individual.The subjects were then categorized into two groups; presence (ovulation group) or absence of ovulation (non-ovulation group).Grip strength and jump performance were measured once in each of the four phases.To evaluate jump performance, squat jump (SJ) and counter-movement jump (CMJ) were undertaken.[Results] CMJ height significantly improved in the ovulation phase exclusively for the ovulation group (p<0.05).Grip strength and SJ height were stable across the four phases for both ovulation and non-ovulation groups.[Conclusion] Dynamic power performance involving stretch-shortening cycle may be influenced by the menstrual cycle phase, with an improvement occurring in the ovulation phase.The change in performance, however, may be limited to individuals with ovulation.