“…34, 36, 37, 41, 46, 56, 68] being known from statistical studies to be a serious disorder in the perinatal period [5,8,19,24,42,61]. It may be divided into two pathogenic groups, an intrauterine form caused by a pulmonary infection occurring during intrauterine life, and an intrapartal form caused by infectious agents during delivery [51].…”