The study of abdomen-wall malformations corresponds almost exclusively to omphalocele and gastroschisis, despite their different embryonic origin, studies of the associated risk factors should be performed. The objective of this study was to compare the perinatal risk factors that in uence mortality and birth-weight in patients with omphalocele and gastroschisis, using Bayesian analogues of the t-test, ANOVA, and logistic regression. The data were obtained from the Perinatal Computer System of the Hospital Gineco-Obstétrico Isidro Ayora. From January 2009 to December 2018, 68 patients with gastroschisis and 18 with omphalocele were found, with a rate of 7.7 and 2 per 10,000 live newborns. Patients with omphalocele had a better birth weight, gastroschisis, occurs in young mothers. In both conditions mortality is associated with low weight, malformations or comorbidities in the rst twelve days and respiratory and infectious complications after thirty days. The epidemiological pro le of patients with abdominal wall malformations does not show signi cant differences with what was reported in other populations.