Objective: The objective of this study is to measure pubic length and ischial length and to define ischiopubic index. This may be of value in physical anthropology, anatomy, gynecology to estimate the extent of labor, archeological analyses and in solving medicolegal cases. Methodology: Data were collected over the period of 4 months from June to September 2018 with the total of 120 patients who underwent pelvic and KUB radiographs. The pubic length, ischial length and the ischiopubic index were measued.Pubic length is a straight line drawn on the radiograph from centre of the triradiate cartilage to the medial end of pubic symphysis. Ischial length is a straight line drawn on the radiograph from triradiate cartilage perpendicular to the line joining the bilateral lower ischial tuberosities.Ischiopubic index is determined from the pubic length divided by ischial length, and then multiplied by 100.