A method for estimating a sex of a human using an upper arm end (100) includes a step (110) of inputting three-dimensional image data of a distal end of the arm of a subject by a computer device, a step of analyzing the image data 120), determining (130) the value of at least one measurement item using the measurement value, and estimating (130) the gender of the subject's upper arm bones based on the value of the at least one measurement item ).
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