Background: Many genes affect behavior and aid in the detection of many psychiatric problems. MAOA gene (warrior gene) was one of the genes whose variants have been studied deeply due to its association with many delinquent behaviors. It is responsible for the coding of MAOA enzyme responsible for degradation of different neurotransmitters in the brain. This gene has two variants, one variant leading to expression of high amounts of MAOA enzyme while the other leads to expression of low amount. MAOA gene is an example of complex expression genes in which protein expression is affected by environmental factors. Child abuse is one of the factors which affect this gene expression so affect the future behavior of the abused child. Objectives: Child abuse cases were studied regarding different aspects of injuries and perpetrators with special concern for the MAOA variants as risk factors between cases of child abuse. Patients and Methods: A prospective study was carried out to all child abuse cases admitted to the Egyptian Medicine authority, during the period between 1st of February 2012 to 31st of October 2013. Data collected was age, gender, type, multiplicity, site and repetition of injuries and degree of complications. MAOA gene was studied regarding its variants and their relation to different variables of injuries caused by the abuse. Results: 44 cases were studied, the most prevalent age group was from 2-6yrs (52.3%), females (n=23) were slightly higher than males (n=21), multiple types of injuries was a combination of blunt and thermal injuries (n=20, 45%), extremities were the main site of injuries (n=19, 43%) followed by the head and neck. Severe physical complications were present in 19 cases (43%) in the form of fracture bones, disfiguring wounds. Repeated episodes occurred in 35 cases (79%). Fathers were the leading abusers (n=24, 24%). Regarding the MAOA gene variants, the high variant occurred in 27 cases (61.4%) while the low one occurred was present in 17 cases (38.6%).