Head‐to‐cervix force: an important physiological variable in labour. 2. Peak active force, peak active pressure and mode of delivery

Allman, A. C. J.; Genevier, E.S.G.; Johnson, Mark R.; Steer, Philip

doi:10.1111/j.1471-0528.1996.tb09871.x

BJOG

1996

DOI: 10.1111/j.1471-0528.1996.tb09871.x

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Head‐to‐cervix force: an important physiological variable in labour. 2. Peak active force, peak active pressure and mode of delivery

A. C. J. Allman

¹

,

E.S.G. Genevier

²

,

Mark R. Johnson

³

et al.

Abstract: Objective To assess the relation between peak active (above baseline) head‐to‐cervix force (paHCF) and peak active (above baseline) intrauterine pressure (paIUP) in labour, and to compare the relation between labours progressing well and ending in vaginal delivery and those labours progressing slowly and ending in caesarean section. Design Prospective observational study. Setting The labour ward of a London teaching hospital. Participants Forty women in labour who agreed to have an expe… Show more

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Cited by 47 publications

(23 citation statements)

References 11 publications

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2

Mentioning

21

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“…Furthermore, the findings are not easy to explain, and emphasise the complexity of the mechanism of labour which requires further study. The observation that the rise in intrauterine pressure lags behind the rise in head:cervix force 12 is consistent with our own findings using continuous cervi‐metry 16 . We attributed this to uptake in slack in the cervical collagen fibres by the initial part of myometrial contraction.…”

supporting

confidence: 92%

The active mismanagement of labour

Olaih

¹

,

Gee

²

1996

BJOG

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Exaggerated anticipatory anxiety is common in social anxiety disorder (SAD). Neuroimaging studies have revealed altered neural activity in response to social stimuli in SAD, but fewer studies have examined neural activity during anticipation of feared social stimuli in SAD. The current study examined the time course and magnitude of activity in threat processing brain regions during speech anticipation in socially anxious individuals and healthy controls (HC). Method Participants (SAD n = 58; HC n = 16) underwent functional magnetic resonance imaging (fMRI) during which they completed a 90s control anticipation task and 90s speech anticipation task.

“…Furthermore, the findings are not easy to explain, and emphasise the complexity of the mechanism of labour which requires further study. The observation that the rise in intrauterine pressure lags behind the rise in head:cervix force 12 is consistent with our own findings using continuous cervi‐metry 16 . We attributed this to uptake in slack in the cervical collagen fibres by the initial part of myometrial contraction.…”

supporting

confidence: 92%

The active mismanagement of labour

Olaih

¹

,

Gee

²

1996

BJOG

Get access via publisher Add to dashboard Cite

Exaggerated anticipatory anxiety is common in social anxiety disorder (SAD). Neuroimaging studies have revealed altered neural activity in response to social stimuli in SAD, but fewer studies have examined neural activity during anticipation of feared social stimuli in SAD. The current study examined the time course and magnitude of activity in threat processing brain regions during speech anticipation in socially anxious individuals and healthy controls (HC). Method Participants (SAD n = 58; HC n = 16) underwent functional magnetic resonance imaging (fMRI) during which they completed a 90s control anticipation task and 90s speech anticipation task.

“…We feel that the 2 stages of labor are arbitrary subdivisions of a continuum which both have significant pressure effects onto the pelvic floor. This view is supported by reports showing that substantial forces from the presenting part of the fetus are exerted on to the pelvic floor during the whole labor process [9][10][11]. Subdividing this continuum into arbitrary labor stages restricts the sampling of data and may introduce spurious statistical calculations.…”

Section: Discussionsupporting

confidence: 50%

Effect of the Duration of Labor on Postpartum Postvoid Residual Bladder Volume

Yip

¹

,

Hin

²

,

Chung³

1998

Gynecol Obstet Invest

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Exaggerated anticipatory anxiety is common in social anxiety disorder (SAD). Neuroimaging studies have revealed altered neural activity in response to social stimuli in SAD, but fewer studies have examined neural activity during anticipation of feared social stimuli in SAD. The current study examined the time course and magnitude of activity in threat processing brain regions during speech anticipation in socially anxious individuals and healthy controls (HC). Method Participants (SAD n = 58; HC n = 16) underwent functional magnetic resonance imaging (fMRI) during which they completed a 90s control anticipation task and 90s speech anticipation task.

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“…The rise in intrauterine pressure during uterine contractions in labor results in a 60% reduction in uteroplacental perfusion causing transient fetal and placental hypoxia. [20][21][22] Studies comparing the efficacy and safety between FCB and PG-E2 found that the latter is associated with higher risk of excessive uterine activity and tachysystole. 23,24 This might explain our observation of a higher rate of NRFHR during IOL with PGE2 and not with FCB.…”

Section: Results In the Context Of What Is Knownmentioning

confidence: 99%

The role of Doppler studies in predicting non‐reassuring fetal heart rate monitoring following induction of labor

Volpert

¹

,

Tairy

²

,

Tamayev

³

et al. 2025

Intl J Gynecology & Obste

0

Get access via publisher Add to dashboard Cite

Exaggerated anticipatory anxiety is common in social anxiety disorder (SAD). Neuroimaging studies have revealed altered neural activity in response to social stimuli in SAD, but fewer studies have examined neural activity during anticipation of feared social stimuli in SAD. The current study examined the time course and magnitude of activity in threat processing brain regions during speech anticipation in socially anxious individuals and healthy controls (HC). Method Participants (SAD n = 58; HC n = 16) underwent functional magnetic resonance imaging (fMRI) during which they completed a 90s control anticipation task and 90s speech anticipation task.

show abstract

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