The rhythmicity of fetal breathing varies with behavioural state in the human fetus |
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| Authors: | J G Nijhuis C B Martin S Gommers P Bouws R S Bots H W Jongsma |
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| Affiliation: | 1. Centre de Recherches de Biologie du Développement Foetal et Néonatal, Hôpital Port - Royal, Paris, France;2. Department of Anatomy and Cell Biology, and Center for Human Growth and Development, University of Michigan, Ann Arbor, MI, U.S.A.;3. Center for Human Growth and Development and Department of Radiology, University of Michigan, Ann Arbor, MI, U.S.A. |
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| Abstract: | The rhythmicity of human fetal breathing movements was studied during two different behavioural states (1F and 2F, respectively), using real-time B-scan-directed M-mode ultrasound recordings. The mean breath-to-breath interval durations and the standard deviations (SD), and the standard deviations of the interval differences (SDDSI) were calculated. The mean breath-to-breath interval duration was not significantly shorter during 1F than during 2F. SD and SDDSI, however, showed significantly lower values during 1F, demonstrating that the fetal breathing rhythm is more regular during state 1F than during state 2F epochs. Regular fetal breathing is thus a concomitant of state 1F. |
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| Keywords: | human adipose tissue prenatal growth and development |
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