Perinatal mortality and differing socioeconomic status.

During the last decade the area served by the Public Maternity Hospital was significantly altered on some occasions. The perinatal mortality increased after the alteration of the district and the socioeconomic structure of the population was changed. The socioeconomic structure of the population has been defined and expressed as a socioeconomic factor. The obstetric care was mainly carried out without alteration. The object of the investigation was to determine if the exchange itself or the change in the socioeconomic situation of the population of the district was a cause of the increased perinatal mortality.