The EEG features of pregnant women with physiological course of the gestational process

  • Anatoly Smirnov Saint Petersburg State University, 7–9, Universitetskaya nab., Saint Petersburg, 199034, Russian Federation


Based on excluding criteria of the control allocation of norm, the group of women with a low risk of the adverse pregnancy development has been generated. As a result, 38 women among 256 have been sorted out which have made a group of the control. Their age varies from 18 to 32 years (approximately — 26,19±0,68). Under the initial medical anamnesis this group differed from the others by absence of the diseases of kidneys, liver and endocrinous system in anamnesis. The EEG of women with normally developed pregnancy was characterized by the expressive, regular and parietal-occipital dominative alpha-rhythm with distinctive frontal-occipital gradient, and with its insignificant variability under hyperventilation loading, with frequency stability and also insignificant presence the flashes of other rhythms. In their EEG the high index generalized background beta-rhythm (approximately, 70 %) was marked. This rhythm exceeds the standard level, typical to clinical norm. EEG structure of the women group with physiologically developed pregnancy indicates amplification of nonspecific activation of hypothalamohypophysial structures, caused by additional stress at their work. Such strengthening of activation leads to an increase in representation of high-frequency rhythms and, as a consequence, to desynchronizing of tendencies in general EEG activity pattern.


physiologically developed pregnancy, EEG


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How to Cite
Smirnov, A. (2012). The EEG features of pregnant women with physiological course of the gestational process. Biological Communications, (4), 104–113. Retrieved from
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