[Peculiarity of cyclic sleep organization and production of melatonin in intrauterine growth retardation's newborns].

The data about forming of cyclic sleep organization and production of melatonin in intrauterine growth re- tardation's newborns are presented. It was established that disturbance of cyclic sleep organization in newborns with IUGR and low melatonin production indicate the degree of brain's damage after chronic hypoxia.