TY JOUR TI Circadian Rhythm Features of Sympathatic and Parasympathatic Interaction According to Data of Spectral Components of Heart Rate in Pregnant Women and Puerperas in Perinatal Period KW 24-hours cycle KW pregnant women KW puerperas KW perinatal period KW heart rate variability JO Journal of New Medical Technologies AU Girsheva, E.. AU Erokhin, A.N. PY 2014 IS 21 PB INFRA-M Academic Publishing LLC.