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[Age-related dynamics of the shape and size of the subpubic angle in children and adolescents].

The roentgenoanatomical investigation, performed according to archival roentgenograms of the urinary tracts in 57 boys and 294 girls at the age of 2-16 years, characterizes the value of the subpubic angle and age dynamics of its form and size. The form and size of the subpubic angle in the children of the given age varies within large range--acute, right, obtuse; sex differentiation is clearly followed in the group of 11-16 years of age, when in the boys there are three forms of the angles--right (most often occurring), then obtuse and acute (seldom occurring), while in the girls of this age group there are only two forms--obtuse and right with definite predominance frequency of the obtuse angle. The formation of the feminine type of the subpubic angle takes a longer period of time than the masculine type.