Background: Sex determination has been the most intriguing puzzle for forensic pathologists andanthropologists for which efforts are being done since long. Sexual dimorphism is well established in theadult pelvis and it is known to provide the highest level of information about sexual dimorphism. This studywas conducted to know whether this dimorphism exists in fetal bones?Method: A total of 34 pairs of fetal pelvis bones (22 Males + 12 Females), age ranging from 4 months tofull term were collected from unidentified dead fetuses brought in the Department of Forensic Medicinefor the routine medicolegal autopsies, to study for sexual dimorphism in the Department of Anatomy, Pt.B. D. Sharma PGIMS, Rohtak. Samples were divided in 2 age groups and various metric parameters wererecorded with the help of digital vernier caliper. Data obtained was subjected to descriptive & discriminantfunctional analysis.Conclusion: Results of Descriptive and Discriminant Functional Analysis showed that sex determinationcan be done with 100% of accuracy by using different combinations of parameters of fetal ilium. Thisstudy illustrates that sexual dimorphism exists from early fetal life & after mid pregnancy; it can be clearlyestablished by discriminant functional analysis.This research was limited in its analysis due to less availability of specimens as this represents only theresults in north Indian population. Future studies should be done to explore different populations to betterunderstand the sexual dimorphism in fetal bones of different geographic contexts.