Describing latent phase duration and associated characteristics among 1281 low-risk women in spontaneous labor.
chorioamnionitis
fetal malposition
labor
labor progress
latent phase of labor
postdates
Journal
Birth (Berkeley, Calif.)
ISSN: 1523-536X
Titre abrégé: Birth
Pays: United States
ID NLM: 8302042
Informations de publication
Date de publication:
12 2019
12 2019
Historique:
received:
16
11
2018
revised:
24
02
2019
accepted:
07
03
2019
pubmed:
30
3
2019
medline:
10
6
2020
entrez:
30
3
2019
Statut:
ppublish
Résumé
Recent research suggests that latent phase of labor may terminate at 6 rather than 4 centimeters of cervical dilation. The objectives of this study were to: (a) characterize duration of the latent phase of labor among term, low-risk, United States women in spontaneous labor using the women's self-identified onset; and (b) quantify associations between demographic and maternal/newborn health characteristics and the duration of the latent phase. This prospective study (n = 1281) described the duration of the latent phase of labor in hours, stratified by parity at the mean, median, and 80th, 90th, and 95th percentiles. The duration of the latent phase was compared for each characteristic using t tests or Wilcoxon rank-sum tests and regression models that controlled for confounders. In this sample of predominantly white, healthy women, duration of the latent phase of labor was longer than described in previous studies: The median duration was 9.0 hours and mean duration was 11.8 hours in nulliparous women. The median duration was 6.8 hours and mean duration was 9.3 hours in multiparous women. Among nulliparous women, longer duration was seen in women whose fetus was in a malposition. Among multiparous women, longer durations were noted in women with chorioamnionitis and those who gave birth between 41 and 41 + 6 weeks' gestation (vs between 40 and 40 + 6 weeks' gestation). The latent phase of labor may be longer than previously estimated. Contemporary estimates of latent phase of labor duration will help women and providers accurately anticipate, prepare, and cope during spontaneous labor.
Sections du résumé
BACKGROUND
Recent research suggests that latent phase of labor may terminate at 6 rather than 4 centimeters of cervical dilation. The objectives of this study were to: (a) characterize duration of the latent phase of labor among term, low-risk, United States women in spontaneous labor using the women's self-identified onset; and (b) quantify associations between demographic and maternal/newborn health characteristics and the duration of the latent phase.
METHODS
This prospective study (n = 1281) described the duration of the latent phase of labor in hours, stratified by parity at the mean, median, and 80th, 90th, and 95th percentiles. The duration of the latent phase was compared for each characteristic using t tests or Wilcoxon rank-sum tests and regression models that controlled for confounders.
RESULTS
In this sample of predominantly white, healthy women, duration of the latent phase of labor was longer than described in previous studies: The median duration was 9.0 hours and mean duration was 11.8 hours in nulliparous women. The median duration was 6.8 hours and mean duration was 9.3 hours in multiparous women. Among nulliparous women, longer duration was seen in women whose fetus was in a malposition. Among multiparous women, longer durations were noted in women with chorioamnionitis and those who gave birth between 41 and 41 + 6 weeks' gestation (vs between 40 and 40 + 6 weeks' gestation).
CONCLUSIONS
The latent phase of labor may be longer than previously estimated. Contemporary estimates of latent phase of labor duration will help women and providers accurately anticipate, prepare, and cope during spontaneous labor.
Identifiants
pubmed: 30924182
doi: 10.1111/birt.12428
pmc: PMC6765461
mid: NIHMS1017442
doi:
Types de publication
Journal Article
Research Support, N.I.H., Extramural
Research Support, U.S. Gov't, P.H.S.
Langues
eng
Sous-ensembles de citation
IM
Pagination
592-601Subventions
Organisme : AHRQ HHS
ID : K08 HS024733
Pays : United States
Organisme : NICHD NIH HHS
ID : K12 HD043488
Pays : United States
Organisme : NICHD NIH HHS
ID : L30 HD094535
Pays : United States
Organisme : NICHD NIH HHS
ID : R00 HD079658
Pays : United States
Informations de copyright
© 2019 Wiley Periodicals, Inc.
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