Criminal abortion is the unlawfully termination of pregnancy before the fetus become able to survive and outside the therapeutic indications. Allegations of exposure to trauma during pregnancy which resulted in abortion are commonly encountered in the Egyptian population. The study was conducted to evaluate the effect of trauma in cases of allegation of abortion, against the other non – traumatic (pathological causes). Medicolegal investigation of the causes in allegation of criminal abortion should include complete external physical examination of the victim and evaluation of the severity of trauma. Laboratory investigations begin with diagnosis of pregnancy. Examination of POC to determine whether it is human or not should be carried out using one of the antigen-antibody test. Histopathologic examination is important in diagnosing and documenting that pregnancy was intrauterine and excluding extrautrine pregnancy, documentation of suspected or unsuspected fetal anomalies, estimation of gestational age, estimation of the interval of retention after embryonic or fetal death and exclusion of gestational trophoblastic diseases. In cases of criminal paternity testing, a forensic DNA laboratory examines the POC or the fetus, in whole.