[Characteristics of the external conjugate diameter in 7-to-14-year-old students]

Measuring the length of the external conjugate in school children aged 7-14 years the authors determined its standard values for this population group. The measurements were performed in 1942 school children of both sexes in the region of Pelagonija (Macedonia). The length of the external conjugate in the seventh and the eighth year of life proved to be higher in boys (12.0 cm and 12.26 cm respectively) and in the ninth year of life it was significantly longer in girls (13.46 cm; t = 3.1; P less than 0.05). The intensity of the increase in the length of the external conjugate in girls was found to be the highest in their ninth (11.7%), twelfth (11.16%), and fourteenth year (10.24%), i.e. in the period of their intensive growth in prepuberty and puberty. The standards determined by these measurements are adopted as norms for the length of this pelvis dimension in the population of Pelagonija.