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second stage of labor

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https://www.readbyqxmd.com/read/28406564/neonatal-shoulder-width-suggests-a-semirotational-oblique-birth-mechanism-in-australopithecus-afarensis
#1
Jeremy M DeSilva, Natalie M Laudicina, Karen R Rosenberg, Wenda R Trevathan
Birth mechanics in early hominins are often reconstructed based on cephalopelvic proportions, with little attention paid to neonatal shoulders. Here, we find that neonatal biacromial breadth can be estimated from adult clavicular length (R(2) = 0.80) in primates. Using this relationship and clavicular length from adult Australopithecus afarensis, we estimate biacromial breadth in neonatal australopiths. Combined with neonatal head dimensions, we reconstruct birth in A. afarensis (A.L. 288-1 or Lucy) and find that the most likely mechanism of birth in this early hominin was a semi-rotational oblique birth in which the head engaged and passed through the inlet transversely, but then rotated so that the head and shoulders remained perpendicular and progressed through the midplane and outlet oblique to the main axis of the female pelvis...
May 2017: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/28405063/perineal-body-length-and-perineal-lacerations-during-delivery-in-primigravid-patients
#2
T Lance Lane, Christopher P Chung, Paul M Yandell, Thomas J Kuehl, Wilma I Larsen
This study assessed the relation between perineal body length and the risk of perineal laceration extending into the anal sphincter during vaginal delivery in primigravid patients at an institution with a low utilization of episiotomy. This was a prospective study of primigravid patients in active labor. Primigravid women with singleton pregnancies who were in the first stage of labor at 37 weeks gestation or greater were recruited, and the admitting physician measured the length of the perineal body. The degree of perineal laceration and other delivery characteristics were recorded...
April 2017: Proceedings of the Baylor University Medical Center
https://www.readbyqxmd.com/read/28389222/cesarean-delivery-in-the-second-stage-of-labor-and-the-risk-of-subsequent-premature-birth
#3
Stephen L Wood, Selphee Tang, Susan Crawford
BACKGROUND: Cesarean delivery is being increasingly used by obstetricians for indicated deliveries in the second stage of labor. Unplanned extension of the uterine incision involving the cervix often occurs with these surgeries. Therefore, we hypothesized that cesarean delivery in the second stage of labor may increase the rate of subsequent spontaneous premature birth. OBJECTIVE: We sought to determine if cesarean delivery in the late first stage of labor or in the second stage of labor increases the risk of a subsequent spontaneous preterm birth...
April 4, 2017: American Journal of Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28386483/mode-of-delivery-according-to-leisure-time-physical-activity-before-and-during-pregnancy-a-multicenter-cohort-study-of-low-risk-women
#4
Emilie Nor Nielsen, Per Kragh Andersen, Hanne Kristine Hegaard, Mette Juhl
Objectives. To examine the association between maternal leisure time physical activity and mode of delivery. Study Design. Population-based multicentre cohort. From the Danish Dystocia Study, we included 2,435 nulliparous women, who delivered a singleton infant in cephalic presentation at term after spontaneous onset of labor in 2004-2005. We analysed mode of delivery according to self-reported physical activity at four stages, that is, the year before pregnancy and during first, second, and third trimester, in logistic regression models...
2017: Journal of Pregnancy
https://www.readbyqxmd.com/read/28382061/effect-of-breathing-technique-of-blowing-on-the-extent-of-damage-to-the-perineum-at-the-moment-of-delivery-a-randomized-clinical-trial
#5
Zohre Ahmadi, Shahnaz Torkzahrani, Firouze Roosta, Nezhat Shakeri, Zohre Mhmoodi
INTRODUCTION: One of the important tasks in managing labor is the protection of perineum. An important variable affecting this outcome is maternal pushing during the second stage of labor. This study was done to investigate the effect of breathing technique on perineal damage extention in laboring Iranian women. MATERIALS AND METHODS: This randomized clinical trial was performed on 166 nulliparous pregnant women who had reached full-term pregnancy, had low risk pregnancy, and were candidates for vaginal delivery in two following groups: using breathing techniques (case group) and valsalva maneuver (control group)...
January 2017: Iranian Journal of Nursing and Midwifery Research
https://www.readbyqxmd.com/read/28378179/non-progressive-labor-in-the-second-stage-leading-to-vacuum-extraction-is-a-risk-factor-for-recurrent-non-progressive-labor
#6
Avi Harlev, Sarah K Fatool, Ruslan Sergienko, Eyal Sheiner
OBJECTIVE: To address risk factors and perinatal outcomes after vacuum-assisted delivery (VAD) due to non-progressive labor (NPL) 2nd stage, and to assess its impact on the subsequent delivery. METHODS: A retrospective, population-based cohort study was conducted in a tertiary medical center. Maternal characteristics, and maternal and neonatal outcomes of singleton pregnancies that resulted in VAD due to NPL 2nd stage were compared to those that resulted in VAD due to other indications...
April 4, 2017: Archives of Gynecology and Obstetrics
https://www.readbyqxmd.com/read/28376550/influence-of-patient-level-factors-on-mode-of-delivery-among-operative-vaginal-delivery-candidates-in-modern-practice
#7
Torri D Metz, Christina Gonzalez, Amanda A Allshouse, Erick Henry, Sean Esplin
Objective We aimed to evaluate which patient-level factors influence mode of delivery among candidates for operative vaginal delivery. Study Design Cross-sectional study of candidates for operative vaginal delivery from 18 hospitals over 8 years. Probabilities of mode of delivery were estimated using hierarchical logistic modeling adjusting for clustering within physician and hospital. Results Total 3,771 (64%) women delivered with forceps, 1,474 (25%) vacuums, and 665 (11%) cesareans. Odds of forceps versus vacuum were higher with induction (OR = 2...
April 4, 2017: American Journal of Perinatology
https://www.readbyqxmd.com/read/28369942/sonographic-evaluation-of-the-fetal-spine-position-and-success-rate-of-manual-rotation-of-the-fetus-in-occiput-posterior-position-a-randomized-controlled-trial
#8
Bianca Masturzo, Antonio Farina, Lorenza Attamante, Annalisa Piazzese, Alessandro Rolfo, Pietro Gaglioti, Tullia Todros
BACKGROUND: To evaluate whether sonographic (US) diagnosis of the fetal spine position could increase the success rate of manual rotation of the fetal occiput (MRFO) in second-stage arrest in persistent occiput posterior position (OPP). METHODS: In this randomized controlled parallel single-center trial, 58 nulliparous in second-stage arrest of labor with fetus in cephalic presentation and OPP diagnosed by US were randomly assigned to group A where the fetal spine position was not known by the operator or to group B where the operator knew it...
April 3, 2017: Journal of Clinical Ultrasound: JCU
https://www.readbyqxmd.com/read/28368798/-risks-factors-of-cesarean-delivery-after-3hours-of-delayed-pushing
#9
S Cheniere, S Ménard, M-C Lamau, F Goffinet, C Le Ray
OBJECTIVES: Identify the factors associated with caesarean delivery for unengaged fetal head beyond 3hours of passive second stage of labor, among primiparous patients. METHODS: A case-control study conducted in level III universitary center between October 2012 and September 2015. Only primiparous at term, with a singleton, cephalic fetus and a passive second stage of labor prolonged over 3hours before pushing were included. During the second stage of labor, patients who had caesarean for abnormal fetal heart rate were excluded...
February 2017: Gynecologie, Obstetrique, Fertilite & Senologie
https://www.readbyqxmd.com/read/28364584/follistatin-during-pregnancy-and-its-potential-role-as-an-ovarian-suppressing-agent
#10
Angela Köninger, Börge Schmidt, Daniela Damaske, Cahit Birdir, Antje Enekwe, Rainer Kimmig, Thomas Strowitzki, Alexandra Gellhaus
OBJECTIVE: Ovarian quiescence is a common condition during pregnancy. In vitro, follistatin, an antagonist of follicle-stimulating hormone, blocks follicular development at early stages, and its serum levels increase during pregnancy. A possible surrogate biomarker of ovarian arrest during pregnancy is a decrease in anti-mullerian hormone (AMH) levels followed by an increase in these levels on the second day after labor. The purpose of this study was to determine whether follistatin could act as an ovarian-suppressing agent during pregnancy...
March 22, 2017: European Journal of Obstetrics, Gynecology, and Reproductive Biology
https://www.readbyqxmd.com/read/28351816/rotational-forceps-versus-manual-rotation-and-direct-forceps-a-retrospective-cohort-study
#11
Stephen O'Brien, Fiona Day, Erik Lenguerrand, Katie Cornthwaite, Sian Edwards, Dimitrios Siassakos
OBJECTIVE: Rotational forceps and manual rotation followed by direct forceps are techniques used in the management of malposition of the fetal head in the second stage of labor. However, there is widespread debate regarding their relative safety and utility. We aimed to compare the effectiveness and safety of rotational forceps with manual rotation followed by direct forceps, for management of fetal malposition at full dilation. STUDY DESIGN: A retrospective cohort study in a single tertiary obstetric unit with >6000 births per year...
March 22, 2017: European Journal of Obstetrics, Gynecology, and Reproductive Biology
https://www.readbyqxmd.com/read/28327433/sonographic-prediction-of-outcome-of-vacuum-deliveries-a%C3%A2-multicenter-prospective-cohort-study
#12
Birgitte H Kahrs, Sana Usman, Tullio Ghi, Aly Youssef, Erik A Torkildsen, Elsa Lindtjørn, Tilde B Østborg, Sigurlaug Benediktsdottir, Lis Brooks, Lotte Harmsen, Pål R Romundstad, Kjell Å Salvesen, Christoph C Lees, Torbjørn M Eggebø
BACKGROUND: Safe management of the second stage of labor is of great importance. Unnecessary interventions should be avoided and correct timing of interventions should be focused. Ultrasound assessment of fetal position and station has a potential to improve the precision in diagnosing and managing prolonged or arrested labors. The decision to perform vacuum delivery is traditionally based on subjective assessment by digital vaginal examination and clinical expertise and there is currently no method of objectively quantifying the likelihood of successful delivery...
March 19, 2017: American Journal of Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28324223/adverse-neonatal-and-maternal-outcome-following-vacuum-assisted-vaginal-delivery-does-indication-matter
#13
Lina Salman, Amir Aviram, Eyal Krispin, Arnon Wiznitzer, Rony Chen, Rinat Gabbay-Benziv
PURPOSE: To estimate the impact of indication for vacuum-assisted vaginal delivery on neonatal and maternal adverse outcome. METHODS: Retrospective analysis of women carrying singleton-term pregnancies undergoing vacuum-assisted vaginal delivery in a tertiary hospital (2007-2014). Cohort was stratified by indication: non-reassuring fetal heart rate or prolonged second stage. Primary outcome was adverse neonatal outcome and secondary outcome was maternal morbidity...
March 21, 2017: Archives of Gynecology and Obstetrics
https://www.readbyqxmd.com/read/28322776/a-randomized-double-blinded-controlled-trial-of-the-effects-of-fluid-rate-and-or-presence-of-dextrose-in-intravenous-fluids-on-the-labor-course-of-nulliparas
#14
Alex Fong, Allison E Serra, Deysi Caballero, Thomas J Garite, Vineet K Shrivastava
BACKGROUND: Prolonged labor has been demonstrated to increase adverse maternal and neonatal outcome. A practice that may decrease the risk of prolonged labor is the modification of fluid intake during labor. OBJECTIVE: Several studies demonstrated that increased hydration in labor as well as addition of dextrose-containing fluids may be associated with a decrease in length of labor. The purpose of our study was to characterize whether high-dose intravenous fluids, standard-dose fluids with dextrose, or high-dose fluids with dextrose show a difference in the duration of labor in nulliparas...
March 18, 2017: American Journal of Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28316849/spontaneous-pneumomediastinum-in-labor
#15
Mohamed Adnane Berdai, Said Benlamkadem, Smael Labib, Mustapha Harandou
Spontaneous pneumomediastinum and subcutaneous emphysema also known as Hamman's syndrome is a very rare complication of labor that is often related to the valsalva maneuver during the labor. In most case, Hamman's syndrome is a self-limiting condition, rarely complicated unless there are underlying respiratory diseases. Chest X-ray can be a useful early diagnostic technique in severe clinical presentation. We report an uneventful pregnancy in a primigravid parturient, which was complicated in the late second stage of labor by the development of subcutaneous emphysema, pneumomediastinum, and mild pneumothorax...
2017: Case Reports in Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28283828/risk-factors-and-peripartum-outcomes-of-failed-epidural-a-prospective-cohort-study
#16
Carmen Bucstain, Gali Garmi, Noah Zafran, Sivan Zuarez-Easton, Julia Carmeli, Raed Salim
PURPOSE: Awareness to rate, risk factors, and the associated peripartum outcomes of failed epidural analgesia (FEA) may improve expectations and labor management. We aimed to identify risk factors for FEA and to examine peripartum outcomes associated with failure. METHODS: A prospective cohort study conducted between March 2015 and August 2015, at a single university medical center. Laboring women at ≥34 weeks, receiving epidural analgesia, were eligible. Pain was evaluated using a 0-10 cm visual analogue scale (VAS)...
March 10, 2017: Archives of Gynecology and Obstetrics
https://www.readbyqxmd.com/read/28279445/a-comprehensive-analysis-of-continuous-epidural-analgesia-s-effect-on-labor-and-neonates-in-maternal-hypertensive-disorder-patients
#17
Bin Han, Mingjun Xu
BACKGROUND: Maternal hypertensive disorder is one of the most common and severe medical complications during pregnancy. Epidural analgesia administration is widely used during labor process. AIM: To evaluate the potential advantage or disadvantage of continuous epidural analgesia's on labor and neonates for maternal hypertensive disorder patients comprehensively. METHODS: We have retrospectively analyzed 232 patients who diagnosed as maternal hypertensive disorder in our hospital since 2015...
January 2017: Pregnancy Hypertension
https://www.readbyqxmd.com/read/28260290/-the-influence-of-the-intrapartum-inventions-on-the-maternal-and-neonatal-outcomes-of-vaginal-birth-after-cesarean
#18
S W Wu, D He, W Y Zhang
Objective: To investigate the maternal and neonatal outcomes after different intrapartum interventions for vaginal birth after cesarean (Vaginal Birth After Cesarean-section, VBAC). Methods: One hundred and forty three cases in Beijing Obstetrics & Gynecology Hospital, Capital Medical University from January 2015 to November 2016 were selected retrospectively.The relationship between the intrapartum inventions such as induction style, oxytocin usage and spinal analgesia and the maternal and neonatal outcomes such as delivery way, labor time, postpartum hemorrhage and fetal distress were analyzed in pregnant women underwent VBAC...
February 21, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/28238320/-oxytocin-administration-during-spontaneous-labour-guidelines-for-clinical-practice-guidelines-short-text
#19
C Dupont, M Carayol, C Le Ray, C Barasinski, R Beranger, A Burguet, A Chantry, C Chiesa, B Coulm, A Evrard, C Fischer, L Gaucher, C Guillou, F Leroy, E Phan, A Rousseau, V Tessier, F Vendittelli, C Deneux-Tharaux, D Riethmuller
OBJECTIVES: To define the different stages of spontaneous labour. To determine the indications, modalities of use and the effects of administering synthetic oxytocin. And to describe undesirable maternal and perinatal outcomes associated with the use of synthetic oxytocin. METHOD: A systematic review was carried out by searching Medline database and websites of obstetrics learned societies until March 2016. RESULTS: The 1st stage of labor is divided in a latence phase and an active phase, which switch at 5cm of cervical dilatation...
January 2017: Gynecologie, Obstetrique, Fertilite & Senologie
https://www.readbyqxmd.com/read/28236651/intravenous-fluid-rate-for-reduction-of-cesarean-delivery-rate-in-nulliparous-women-a-systematic-review-and-meta-analysis
#20
REVIEW
Robert M Ehsanipoor, Gabriele Saccone, Neil S Seligman, Rebecca A M Pierce-Williams, Andrea Ciardulli, Vincenzo Berghella
INTRODUCTION: The National Institute of Child Health and Human Development, American College of Obstetricians and Gynecologists, and Society for Maternal-Fetal Medicine have emphasized the need to promote vaginal delivery and have offered recommendations to safely prevent primary cesarean delivery. However, there has been limited discussion regarding management of intravenous fluids and other aspects of labor management that may influence mode of delivery. Therefore the aim of our study was to determine whether an intravenous fluid rate of 250 vs...
February 25, 2017: Acta Obstetricia et Gynecologica Scandinavica
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