The latent phase of labor

Cohen, Wayne R.; Friedman, Emanuel A.

doi:10.1016/j.ajog.2022.04.029

Cited by 10 publications

(5 citation statements)

References 60 publications

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“…Moreover, while the latent (i.e., early) and active phases of labor have been characterized in human parturition at term, they have not been described in premature labor. 132 , 133 , 134 , 135 Therefore, due to the lack of nomenclature and description of these phases in premature labor in humans or mice, we referred to them as “signs of early premature labor” and “signs of active premature labor.” Lastly, the ascension of bacteria was determined based on fluorescent signals, and bacteria quantification or viability was not assessed. Yet, the dramatic differences observed between the preterm labor and vehicle control groups were sufficient to demonstrate that premature labor facilitates the ascension of bacteria.…”

Section: Limitations Of the Studymentioning

confidence: 99%

Host-microbiome interactions in distinct subsets of preterm labor and birth

Galaz,

Romero,

Greenberg

et al. 2023

iScience

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Section: Limitations Of the Studymentioning

confidence: 99%

Host-microbiome interactions in distinct subsets of preterm labor and birth

Galaz,

Romero,

Greenberg

et al. 2023

iScience

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“…4 The expanding opening of the external cervical os occurs due to the biochemical and mechanical forces (uterine contractions) that break down and rearrange the collagen and connective fibers. 2,3 At the onset of the second stage of labor, the cervix is considered fully dilated and essentially abuts the lower uterine segment which stretches to accommodate the fetal head. 4 After the birth of the fetus, the cervix regains its original form, and some thickness can be felt.…”

Section: Cervical Physiology During Term Labormentioning

confidence: 99%

“…During the latent phase of labor remodeling of cervical tissue occurs causing effacement or shortening and thinning of the cervix. 2,3 Essentially, the cervical tissue becomes functionally part of the lower uterine segment at which time it is considered to be 100% effaced. 4 The expanding opening of the external cervical os occurs due to the biochemical and mechanical forces (uterine contractions) that break down and rearrange the collagen and connective fibers.…”

Section: Cervical Physiology During Term Labormentioning

confidence: 99%

“…Smooth muscle is the smallest component, only being 10% of the composition on average. During the latent phase of labor remodeling of cervical tissue occurs causing effacement or shortening and thinning of the cervix 2,3 . Essentially, the cervical tissue becomes functionally part of the lower uterine segment at which time it is considered to be 100% effaced 4 .…”

Section: Cervical Lacerationsmentioning

confidence: 99%

“…Essentially, the cervical tissue becomes functionally part of the lower uterine segment at which time it is considered to be 100% effaced 4 . The expanding opening of the external cervical os occurs due to the biochemical and mechanical forces (uterine contractions) that break down and rearrange the collagen and connective fibers 2,3 . At the onset of the second stage of labor, the cervix is considered fully dilated and essentially abuts the lower uterine segment which stretches to accommodate the fetal head 4 .…”

Section: Cervical Lacerationsmentioning

confidence: 99%

See 2 more Smart Citations

Cervical Lacerations: A Review of Risks

Salazar,

Grayson,

Tsamolias

2023

J Midwife Womens Health

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Cervical laceration (CL), although infrequent, is an often‐unrecognized complication of vaginal birth and can cause significant blood loss in the immediate postpartum period. The rate of clinically significant CL ranges from 0.14% to 0.2% of births. Nulliparity, operative vaginal birth, occiput posterior position of the fetus, induction of labor, and episiotomy have been cited as possible risk factors. Much of the available literature regarding CL, however, is dated or anecdotal, and there are varying and inconsistent risk associations with its occurrence. Given this unpredictability, CL should be considered in all women with immediate postpartum hemorrhage when there is difficulty obtaining hemostasis. Although midwives receive training about CLs, the low incidence may lead to delay in diagnosis and management. This Clinical Rounds case presents a composite case of postpartum hemorrhage caused by a CL. Risk factors, diagnosis and midwifery management are discussed.

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Effects of epidural analgesia at 1 cm cervical dilatation on multiparae: A retrospective cohort study using propensity score‐matching

Chen,

Wu,

Zeng

2024

Intl J Gynecology & Obste

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ObjectiveThe aim of the present study was to investigate the effects of epidural analgesia (EA) administered at cervical dilatation of 1 cm on multiparae who underwent vaginal delivery.MethodsThis propensity score‐matched retrospective cohort research was conducted between 2021 and 2022. All the singleton multiparae who had previous successful vaginal deliveries and epidural analgesia during this delivery were screened for eligibility. The primary outcome was the effect of EA on the duration of labor. The main secondary outcomes included the incidence of cesarean delivery and umbilical arterial pH.ResultsThis study incorporated 686 multiparae who were divided into two cohorts: EA 1 (cervical dilatation = 1 cm, n = 166) and EA 2 (cervical dilatation >1 cm, n = 520). In the propensity score‐matched cohort (including 164 women in each group), there were no statistically significant differences in the incidence of cesarean delivery (4 [2.4%] vs 4 [2.4%], P = 1.000), umbilical arterial pH (7.28 ± 0.06 vs 7.28 ± 0.07, P = 0.550) and other secondary outcomes between the two groups. Based on a comparative assessment of the women who delivered vaginally to the Kaplan–Meier curves and propensity score‐matching (including 160 women in each group), there was no statistical significance in the duration of the first, second and third stages of labor (log rank P, P = 0.811; P = 0.413; P = 0.773, respectively).ConclusionInitiation of epidural analgesia at cervical dilatation of 1 cm in multiparae did not cause adverse effects with regard to the duration of labor, increased cesarean deliveries, and bad neonatal outcomes.

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The latent phase of labor

Cited by 10 publications

References 60 publications

Host-microbiome interactions in distinct subsets of preterm labor and birth

Host-microbiome interactions in distinct subsets of preterm labor and birth

Cervical Lacerations: A Review of Risks

Effects of epidural analgesia at 1 cm cervical dilatation on multiparae: A retrospective cohort study using propensity score‐matching

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