The role of the anterior border of the hip bone in sexual dimorphism: a morphometric study in the North Indian population.

Understanding sexual dimorphism is very important in studies of human evolution and skeletal biology. The ability to determine sex from unknown skeletal remains is vital and methods to do this on the various bones of the human skeleton have been researched extensively especially in the studies related to forensic anthropology. The distinctive morphology and clear sexual dimorphism of the hip bone makes it an ideal bone for sex determination. Whereas the roles of the parameters of its posterior border (including the greater sciatic notch) are well established, those of the anterior border are not much explored. The present study was designed to establish the morphometric pattern of the anterior border of the hip bone and its role in sexual dimorphism. Material for the current investigation comprised 100 hip bones belonging to 50 cadavers ([M:F = 80:20] and [R:L = 50:50]) obtained from the Department of Anatomy, Government Medical College, Amritsar, Punjab, India. Sixteen parameters of the anterior border were taken and three indices were calculated. Eight parameters were significantly greater in males: (i) straight distance anterior superior iliac spine (ASIS)-symphyseal surface (SS); (ii) straight distance ASIS-pubic tubercle (PT); (iii) straight distance anterior inferior iliac spine (AIIS)-SS; (iv) straight distance AIIS-PT; (v) arch of anterior interspinous notch (ASIS-AIIS); (vi) arch between AIIS and ilio-pubic (IP); (vii) depth of notch between AIIS and IP; (viii) arch of anterior border (ASIS-SS). The results of the present study could be helpful in pronouncing an opinion, for a single specimen, about its origin in general terms or sex.