Objective: We aimed at replicating findings by Köllner and Bleck (2020) regarding their proposed new marker of pubertal organizational hormone effects (OHEs), the ulna-to-fibula ratio (UFR). We tested UFR’s sex-dimorphism, independence of body height, interrelationships with other markers, and relationships to the implicit power motive (nPower) and activity inhibition (AI).Method: Our pre-registered, cross-sectional, high-powered study (N = 250; 148 women; after exclusions) included the Picture-Story Exercise (nPower, AI) and anthropometry of ulna and fibula length, facial width and height, shoulder/waist/hip circumference, and 2D:4D digit ratio.Results: UFR was sex-dimorphic (d = 0.37; outliers excluded), independent of body height, and significantly associated with other possible markers of pubertal OHEs, including facial width-to-height ratio, waist-to-hip ratio, and shoulder-to-hip ratio. As predicted, a “sex-typical” (high for men, low for women) UFR was associated with the inhibited power motive (outliers excluded). Neither nPower’s sex-dimorphic relationship with UFR, nor the sex-dimorphic relationship of the inhibited power motive with UFR asymmetry (deemed unreliable and already omitted from the preregistration) reported by Köllner and Bleck (2020) were replicated. Conclusions: Our findings bolster UFR’s status as a marker of pubertal OHEs: It is sexually dimorphic, unrelated to body height, related to other markers, and shows sex-dimorphic associations with the inhibited power motive. In conjunction with findings by Schultheiss et al. (2019) for prenatal OHEs, there is also accumulating evidence for hormonal contributions to implicit motive development.