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Gynecol Obstet Fertil Senol. 2018 Feb;46(2):93-98. doi: 10.1016/j.gofs.2017.11.006. Epub 2018 Jan 20.

[Occiput posterior presentation at delivery: Materno-foetal outcomes and predictive factors of rotation].

[Article in French]

Author information

1
Département de gynécologie et d'obstétrique, hôpitaux universitaires de Genève, 32, boulevard de la Cluse, 1211 Genève 14, Suisse. Electronic address: veronique.otheningirard@hcuge.ch.
2
Département de gynécologie et d'obstétrique, hôpitaux universitaires de Genève, 32, boulevard de la Cluse, 1211 Genève 14, Suisse. Electronic address: michel.boulvain@hcuge.ch.
3
Département de gynécologie et d'obstétrique, hôpitaux universitaires de Genève, 32, boulevard de la Cluse, 1211 Genève 14, Suisse; Haute école de santé, Suisse occidentale, 45, avenue de Champel, 1206 Genève, Suisse. Electronic address: marie-julia.guittier@hesge.ch.

Abstract

OBJECTIVES:

To describe the maternal and foetal outcomes of an occiput posterior foetal position at delivery; to evaluate predictive factors of anterior rotation during labour.

METHODS:

Descriptive retrospective analysis of a cohort of 439 women with foetuses in occiput posterior position during labour. Logistic regression analysis to quantify the effect of factors that may favour anterior rotation.

RESULTS:

Most of foetuses (64%) do an anterior rotation during labour and 13% during the expulsive phase. The consequences of a persistent foetal occiput posterior position during delivery are a significantly increased average time of second stage labour compared to others positions (65.19minutes vs. 43.29, P=0.001, respectively); a higher percentage of caesarean sections (72.0% versus 4.7%, P<0.001) and instrumental delivery (among low-birth deliveries, 60.7% versus 25.2%, P<0.001); more frequent third-degree perineal tears (14.3% vs. 0.6%, P<0.001) and more abundant blood loss (560mL versus 344mL, P<0.001). In a multi-variable model including nulliparity, station of the presenting part and degree of flexion of the foetal head at complete dilatation, the only predictive factor independent of rotation at delivery is a good flexion of the foetal head at complete dilatation, which multiplies the anterior rotation probability by six.

CONCLUSION:

A good flexion of the foetal head is significantly associated with anterior rotation. Other studies exploring ways to increase anterior rotation during labour are needed to reduce the very high risk of caesarean section and instrumentation associated with the foetal occiput posterior position.

KEYWORDS:

Accouchement; Caesarean section; Césarienne; Delivery; Facteurs prédictifs de rotation; Labour; Occiput posterior position; Predictive factors of rotation; Travail; Variété occipito-postérieure

PMID:
29366610
DOI:
10.1016/j.gofs.2017.11.006
[Indexed for MEDLINE]

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