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Observational Study
. 2017 Oct 17;17(1):363.
doi: 10.1186/s12884-017-1547-6.

Fetal heart rate abnormalities during and after external cephalic version: Which fetuses are at risk and how are they delivered?

Simone M Kuppens  1 , Ida Smailbegovic  2 , Saskia Houterman  3 , Ingrid de Leeuw  2 , Tom H Hasaart  2
Affiliations
Observational Study

Fetal heart rate abnormalities during and after external cephalic version: Which fetuses are at risk and how are they delivered?

Simone M Kuppens et al. BMC Pregnancy Childbirth. .

Abstract

Background: Fetal heart rate abnormalities (FHR) during and after external cephalic version (ECV) are relatively frequent. They may raise concern about fetal wellbeing. Only occasionally they may lead to an emergency cesarean section.

Methods: Prospective cohort study in 980 women (> 34 weeks gestation) with a singleton fetus in breech presentation. During and after external cephalic version (ECV) FHR abnormalities were recorded. Obstetric variables and delivery outcome were evaluated. Primary outcome was to identify which fetuses are at risk for FHR abnormalities. Secondary outcome was to identify a possible relationship between FHR abnormalities during and after ECV and mode of delivery and fetal distress during subsequent labor.

Results: The overall success rate of ECV was 60% and in 9% of the attempts there was an abnormal FHR pattern. In two cases FHR abnormalities after ECV led to an emergency CS. Estimated fetal weight per 100 g (OR 0.90, CI: 0.87-0.94) and longer duration of the ECV-procedure (OR 1.13, CI: 1.05-1.21) were factors significantly associated with the occurrence of FHR abnormalities. FHR abnormalities were not associated with the mode of delivery or the occurrence of fetal distress during subsequent labor.

Conclusions: FHR abnormalities during and after ECV are more frequent with lower estimated fetal weight and longer duration of the procedure. FHR abnormalities during and after ECV have no consequences for subsequent mode of delivery. They do not predict whether fetal distress will occur during labor.

Trial registration: The Eindhoven Breech Intervention Study, NCT00516555 . Date of registration: August 13, 2007.

Keywords: Breech presentation; External cephalic version; Fetal distress; Fetal heart rate; Mode of delivery; Pregnancy.

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Conflict of interest statement

Ethics approval and consent to participate

The medical ethics review committee of the Catharina Hospital Eindhoven approved this research on March 15, 2007. Reference number: M06/1697. Written informed consent was obtained.

Consent for publication

Participants gave their consent for publication.

Of all participants who were included in the study written informed consent was taken.

Competing interests

The authors declare that they have no competing interests.

Publisher’s Note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Figures

Fig. 1
Fig. 1
Labor outcome after successful ECV in 584 patients and the occurrence of fetal distress
See this image and copyright information in PMC

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