A descriptive investigation was carried out in the municipality of Camaguey in the period from September 2009 to July 2010 to explore the incidence of bipolar disorders taking as a population universe the 51 descendants of the 20 consanguineous families, who were studied concerning their degree of consanguinity, the clinical epidemic prevalence, the comorbidity with other pathologies, their suicidal behavior, and the influence of environmental factors in the outbreak of their illness. The Relative Risk (RR), and the crossed products ratio (OR) were calculated statistically; the prevailing type of sickness among patients closely related by blood to bipolar subjects, when compared with that of the control group , was shown to be Bipolar Disorder Type 1. Alcoholism and personality disorders were the prevalent family comorbidity conditions. It was concluded that bipolar patient's relatives are at genetic risk because they fall ill to the disease more frequently than the control group. Besides, the outbreak of the illness was at all times related with a distressing environmental factor, which could be of significance for preventive future strategies that target such population groups at risk.