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Archives of Gynecology and Obstetrics

Published in:

01-03-2010 | Original Article

Sleep–wake cycles in normal fetuses

Authors: Chitkasaem Suwanrath, Thitima Suntharasaj

Published in: Archives of Gynecology and Obstetrics | Issue 3/2010

Abstract

Objective

To study the normal ranges of sleep–wake cycles in normal fetuses.

Materials and methods

A total of 600 fetal heart rate (FHR) tracings were studied from uncomplicated singleton pregnancies at a gestational age between 30 and 40 weeks with a 1-h recording. Two obstetricians interpreted all the FHR recordings independently.

Results

The mean baseline FHR was 141.6 (7.6) beats/min. The median relative percentage time spent in a quiet state was 26% (0–88.6). The median duration of time spent in a quiet state was 15.7 min (0–53.2) within a 1-h recording. Both quiet and active states were established in 84% of cases. The number of FHR accelerations per hour in an active state increased with advancing gestational age, whereas the baseline FHR gradually decreased.

Conclusions

Normal ranges of fetal sleep–wake cycles were established. Fetuses between 30 and 40 weeks had wide variations in the percentage of time spent in sleep–wake states.

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Title: Sleep–wake cycles in normal fetuses
Authors: Chitkasaem Suwanrath
Thitima Suntharasaj
Publication date: 01-03-2010
Publisher: Springer-Verlag
Published in: Archives of Gynecology and Obstetrics / Issue 3/2010
Print ISSN: 0932-0067
Electronic ISSN: 1432-0711
DOI: https://doi.org/10.1007/s00404-009-1111-3

At a glance: The ONWARDS insulin icodec trials

Springer Medicine

Sleep–wake cycles in normal fetuses

Abstract

Objective

Materials and methods

Results

Conclusions

At a glance: The ONWARDS insulin icodec trials

Springer Medicine

Abstract

Objective

Materials and methods

Results

Conclusions

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