Support to Early Diagnosis of Gestational Diabetes Aided by Bayesian Networks Egidio Gomes Filho, Pl´ acido R. Pinheiro (B ) , Mirian C. D. Pinheiro, Luciano C. Nunes, Luiza B. G. Gomes, and Pedro P. M. Farias Universidade de Fortaleza - UNIFOR, Fortaleza, Brazil egidio.filho@gmail.com, {placido,caliope,porfirio}@unifor.br, lcominn@uol.com.br, luizab2g@gmail.com https://www.openpublish.eu Abstract. Gestational Diabetes Mellitus (GDM) is one of the major diseases that affect pregnant women. On average, about 7% of pregnant women are affected by this disease. The consequences of non-treatment for the mother vary from the problems usually caused by Type 1 or 2 dia- betes - such as dizziness, weight gain, hyperglycemia - to complications at the time of delivery. For the fetus, it can cause exaggerated weight gain, hypoglycemia, jaundice, type 2 diabetes, and even fetal death. Therefore, early diagnosis is important to indicate adequate follow-up and treatment in a timely manner. In this context, we carried out the structuring of the diseases that are manifested in concomitance or that are opportunized by the favorable environment caused by the evolution of undiagnosed Diabetes, through Bayesian Networks, with emphasis on Naive Bayes, based on data from a Health Plan Operator which covers eleven Brazil- ian states. Thus, the identification of these diseases and their respective symptoms can be used to support the early diagnosis of GDM. Keywords: Gestational diabetes · Bayesian networks · Comorbidities of GDM 1 Introduction The early diagnosis of diseases has become an ally in improving the quality of life of people, as well as in the generation of economic growth in the countries, thus being of great relevance to society. The earlier a disease is diagnosed, the sooner its treatment can be started by avoiding millions of early deaths [1, 2]. Diabetes Mellitus refers to a chronic metabolic disorder due to an absolute or relative lack of insulin [3]. There are three major types of diabetes, Type 1 diabetes (destruction of β Cells, and usually insulin deficiency); Type 2 diabetes (progressive defect in insulin secretion due to its resistance); and gestational diabetes (intolerance to carbohydrates of varying degrees of intensity, diagnosed for the first time during gestation, that may or not persist after childbirth [4]. Gestational Diabetes Mellitus - GDM generates problems for both the mother (pregnancy-induced hypertension and pre-eclampsia, cesarean delivery, c  Springer Nature Switzerland AG 2019 R. Silhavy (Ed.): CSOC 2019, AISC 985, pp. 360–369, 2019. https://doi.org/10.1007/978-3-030-19810-7_36