This app calculates Z-scores for testicular volume. Enter volume (in case of ultrasound: PI/6 x W x L x H), date of birth, date of observation, chose orchidometer or ultrasound, and click calculate! Lines in the graph represent -2, -1, 0, 1, and 2 SD scores. Designed by Sjoerd Joustra. Programmed by Marc Engelen. Data from Joustra et al, Acta Paediatrica, 2015.
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