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Cervical length and preterm birth

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https://www.readbyqxmd.com/read/28716915/prostaglandin-dehydrogenase-is-a-target-for-successful-induction-of-cervical-ripening
#1
Annavarapu Hari Kishore, Hanquan Liang, Mohammed Kanchwala, Chao Xing, Thota Ganesh, Yucel Akgul, Bruce Posner, Joseph M Ready, Sanford D Markowitz, Ruth Ann Word
The cervix represents a formidable structural barrier for successful induction of labor. Approximately 10% of pregnancies undergo induction of cervical ripening and labor with prostaglandin (PG) E2 or PGE analogs, often requiring many hours of hospitalization and monitoring. On the other hand, preterm cervical ripening in the second trimester predicts preterm birth. The regulatory mechanisms of this paradoxical function of the cervix are unknown. Here, we show that PGE2 uses cell-specific EP2 receptor-mediated increases in Ca(2+) to dephosphorylate and translocate histone deacetylase 4 (HDAC4) to the nucleus for repression of 15-hydroxy prostaglandin dehydrogenase (15-PGDH)...
July 17, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28706170/-multiple-factors-in-the-second-trimester-of-pregnancy-on-preterm-labor-symptoms-and-preterm-birth
#2
Jeung Im Kim, Mi Ock Cho, Gyu Yeon Choi
PURPOSE: The aim of this study was to determine the influence of various factors on preterm labor symptoms (PLS) and preterm birth (PB). METHODS: This prospective cohort study included 193 women in the second stage of pregnancy. Multiple characteristics including body mass index (BMI), smoking, and pregnancy complications were collected through a self-report questionnaire. Pregnancy stress and PLS were each measured with a related scale. Cervical length and birth outcome were evaluated from medical charts...
June 2017: Journal of Korean Academy of Nursing
https://www.readbyqxmd.com/read/28700642/bacterial-communities-found-in-placental-tissues-are-associated-with-severe-chorioamnionitis-and-adverse-birth-outcomes
#3
Ronan M Doyle, Kathryn Harris, Steve Kamiza, Ulla Harjunmaa, Ulla Ashorn, Minyanga Nkhoma, Kathryn G Dewey, Kenneth Maleta, Per Ashorn, Nigel Klein
Preterm birth is a major cause of neonatal mortality and morbidity worldwide. Bacterial infection and the subsequent inflammatory response are recognised as an important cause of preterm birth. It is hypothesised that these organisms ascend the cervical canal, colonise placental tissues, cause chorioamnionitis and in severe cases infect amniotic fluid and the foetus. However, the presence of bacteria within the intrauterine cavity does not always precede chorioamnionitis or preterm birth. Whereas previous studies observing the types of bacteria present have been limited in size and the specificity of a few predetermined organisms, in this study we characterised bacteria found in placental tissues from a cohort of 1391 women in rural Malawi using 16S ribosomal RNA gene sequencing...
2017: PloS One
https://www.readbyqxmd.com/read/28683739/a-multi-centre-non-inferiority-randomised-controlled-trial-to-compare-a-cervical-pessary-with-a-cervical-cerclage-in-the-prevention-of-preterm-delivery-in-women-with-short-cervical-length-and-a-history-of-preterm-birth-pc-study
#4
Bouchra Koullali, Liselotte E M van Kempen, Maud D van Zijl, Christiana A Naaktgeboren, Ewoud Schuit, Dick J Bekedam, Maureen T M Franssen, Sebastiaan W A Nij Bijvank, Marieke Sueters, Marchien van Baal, Marjon A de Boer, Angelo B Hooker, Brenda B J Hermsen, Toon A A M Toolenaar, Joost J Zwart, David P van der Ham, Flip W van der Made, Federico Prefumo, Begoña Martinez de Tejada, Dimitri N M Papatsonis, Anjoke J M Huisjes, Liesbeth H C J Scheepers, Marion E van Hoorn, Tom H M Hasaart, Nico W E Schuitemaker, Karlijn C Vollebregt, Moira A Müller, Inge M Evers, Marinka S Post, Karin de Boer, Henricus Visser, Nico A Mensing van Charante, Josje Langenveld, Nicole Y C Steemers, Ben W J Mol, Martijn A Oudijk, Eva Pajkrt
No abstract text is available yet for this article.
July 6, 2017: BMC Pregnancy and Childbirth
https://www.readbyqxmd.com/read/28651447/the-association-between-fetal-fibronectin-and-spontaneous-preterm-birth-in-twin-pregnancies-with-a-shortened-cervical-length
#5
Kathy C Matthews, Simi Gupta, Jennifer Lam-Rachlin, Daniel H Saltzman, Andrei Rebarber, Nathan S Fox
OBJECTIVE: To estimate the association between a positive fetal fibronectin (fFN) and spontaneous preterm birth (SPTB) in twin pregnancies with a shortened cervical length (CL). STUDY DESIGN: Retrospective cohort study of asymptomatic twin pregnancies managed by a single MFM practice from 2005 to 2016. We included all women with a shortened CL ≤25 mm at 22-28 weeks, and compared outcomes between women with a positive and negative fFN result. RESULTS: One hundred fifty-five patients were included, 129 (83...
July 10, 2017: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/28594783/progestogens-for-maintenance-tocolysis-in-women-with-a-short-cervix-a-randomized-controlled-trial
#6
RANDOMIZED CONTROLLED TRIAL
Fabio Facchinetti, Patrizia Vergani, Mariarosaria Di Tommaso, Luca Marozio, Barbara Acaia, Roberto Vicini, Lucrezia Pignatti, Anna Locatelli, Marina Spitaleri, Chiara Benedetto, Barbara Zaina, Roberto DʼAmico
OBJECTIVE: To assess the efficacy of progestogens for maintenance tocolysis in women undelivered after their first preterm labor episode. METHODS: Women with singleton pregnancies between 22 0/7 and 31 6/7 weeks of gestation with arrested preterm labor and a cervical length 25 mm or less at hospital discharge were eligible. Patients with a previous preterm birth were excluded. In a randomized controlled trial conducted in five university hospitals, women were randomized to receive vaginal progesterone (200 mg per day) or intramuscular 17α-hydroxyprogesterone caproate (341 mg per week) or to an observation groups (control group)...
July 2017: Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28586106/sonographic-measurement-of-cervical-volume-in-pregnant-women-at-high-risk-of-preterm-birth-using-a-geometric-formula-for-a-frustum-versus-3-dimensional-automated-virtual-organ-computer-aided-analysis
#7
Ahmed I Ahmed, Sarah R Aldhaheri, Javier Rodriguez-Kovacs, Deepa Narasimhulu, Manesha Putra, Howard Minkoff, Shoshana Haberman
OBJECTIVES: To compare cervical volume measurements by 3-dimensional (3D) sonography using Virtual Organ computer-aided analysis (VOCAL; GE Healthcare, Milwaukee, WI) versus a manual method using a geometric formula for a frustum. METHODS: We included 142 asymptomatic pregnant women at 16 to 24 weeks gestation at high risk for preterm birth. With a Voluson 730 Expert system (GE Healthcare), they underwent 2-dimensional (2D) transvaginal sonographic cervical length measurements and 3D cervical volume acquisition...
June 6, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/28573877/activity-restriction-and-risk-of-preterm-delivery
#8
Heather I Levin, Anthony Sciscione, Cande V Ananth, Daphnie Drassinower, Sarah G Obican, Ronald J Wapner
PURPOSE: We sought to determine if activity restriction (AR) in a cohort of women at high risk for preterm delivery is associated with the risk of preterm delivery. MATERIALS AND METHODS: This is a secondary analysis of the MFMU's Preterm Prediction Study; a multicenter prospective cohort study designed to identify risk factors of preterm birth. The study group consisted of women with a singleton gestation that at their first study visit (23-24 weeks) had at least one of the following criteria: patient reported contractions, severe back pain, a cervical length <15 mm, spotting, protruding membranes, or positive fetal fibronectin...
June 2, 2017: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/28570639/cerclage-position-cervical-length-and-preterm-delivery-in-women-undergoing-ultrasound-indicated-cervical-cerclage-a-retrospective-cohort-study
#9
Joanna R Cook, Susan Chatfield, Manju Chandiramani, Lindsay Kindinger, Stefano Cacciatore, Lynne Sykes, Tiong Teoh, Andrew Shennan, Vasso Terzidou, Phillip R Bennett
OBJECTIVE: The objectives were to assess whether anatomical location of ultrasound (USS) indicated cervical cerclage and/or the degree of cervical shortening (cervical length; CL) prior to and following cerclage affects the risk of preterm birth (PTB). METHOD: A retrospective cohort study of 179 women receiving cerclage for short cervix (≤25mm) was performed. Demographic data, CL before and after cerclage insertion, height of cerclage (distance from external os) and gestation at delivery were collected...
2017: PloS One
https://www.readbyqxmd.com/read/28535404/placental-inflammation-and-its-relationship-to-cervicovaginal-fetal-fibronectin-in-preterm-birth
#10
Laura van der Krogt, Alexandra E Ridout, Paul T Seed, Andrew H Shennan
OBJECTIVE: Late miscarriage and preterm birth are frequently thought to be associated with inflammation and infection, although in most cases the underlying cause of early delivery remains unknown. The placenta is the organ that links mother and fetus during pregnancy, and postnatal examination may provide useful information about pathophysiology. The relationship between placental pathological lesions and predictive markers of early delivery has not been explored. We sought to characterize preterm deliveries according to placental pathology and relate these to the performance of reliable predictive markers, fetal fibronectin and cervical length...
July 2017: European Journal of Obstetrics, Gynecology, and Reproductive Biology
https://www.readbyqxmd.com/read/28514880/the-uterocervical-angle-and-its-relationship-with-preterm-birth
#11
Alba Farràs Llobet, Laia Regincós Martí, Teresa Higueras, Inés Zulema Calero Fernández, Andrea Gascón Portalés, María M Goya Canino, Elena Carreras Moratonas
OBJECTIVES: The objective of this study is to determine whether the uterocervical angle (UCA) correlates with the risk of spontaneous preterm birth (sPTB) < 34 weeks and assess its interobserver variability. STUDY DESIGN: Case-control study of 275 women including 34 who started labor spontaneously and gave birth before 34 weeks of gestation (preterm group) and 241 who gave birth at term (control group). Images used to report cervical length were re-measured for UCA...
June 6, 2017: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/28511455/cervical-conization-and-the-risk-of-preterm-birth-a-population-based-multicentric-trial-of-turkish-cohort
#12
Ali Galip Zebitay, Emre Sinan Güngör, Gülsah Ilhan, Orkun Çetin, Cem Dane, Canan Furtuna, Fatma Ferda Verit Atmaca, Merve Tuna
INTRODUCTION: Cold Knife Conization (CKC) is one of the most effective methods for the treatment of Cervical Intraepithelial Neoplasia (CIN). Some studies showed a relation between preterm birth and the treatment of CIN; on the other hand, other studies do not show such a relationship. AIM: The present study was conducted with the aim to investigate the pregnancy outcomes of Turkish women regarding demographic characteristics, obstetric history, removed tissue, and residual cervical length after CKC and to determine the effect of removed cervical tissue volume and height on preterm birth...
March 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28508418/quantitative-analysis-of-the-cervical-texture-by-ultrasound-in-the-mid-pregnancy-is-associated-with-spontaneous-preterm-birth
#13
Núria Baños, Alvaro Perez-Moreno, Carla Julià, Clara Murillo-Bravo, David Coronado, Eduard Gratacos, Jan Deprest, Montse Palacio
OBJECTIVE: New tools are required to identify women at increased risk of spontaneous preterm birth (sPTB). Quantitative texture analysis by ultrasound has been used to extract robust features from the ultrasound image of a given tissue to detect subtle changes in its microstructure. This may also be applied to the cervix. We aimed to determine if there is an association between quantitative analysis of the cervical texture (CTx) by ultrasound in the mid-trimester of pregnancy and sPTB <37(+0) weeks...
May 15, 2017: Ultrasound in Obstetrics & Gynecology
https://www.readbyqxmd.com/read/28502186/effectiveness-of-dydrogesterone-17-oh-progesterone-and-micronized-progesterone-in-prevention-of-preterm-birth-in-women-with-a-short-cervix
#14
Olga Pustotina
OBJECTIVE: To compare the efficacy of dydrogesterone, 17-OH progesterone (17OHP) and oral or vaginal micronized progesterone with cerclage for the prevention of preterm birth in women with a short cervix. METHODS: The study included 95 women with singleton gestation and cervical length (CL) ≤ 25 mm. Among these, 35 women were asymptomatic at 15-24 weeks and 60 had symptoms of threatened late miscarriage (LM) or preterm delivery (PD) at 15-32 weeks. Patients were randomized to receive dydrogesterone, 17OHP or oral/vaginal micronized progesterone; after one week of therapy 15 women underwent cerclage...
May 29, 2017: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/28486361/universal-cervical-length-screening-and-antenatal-corticosteroid-timing
#15
Nicole Sahasrabudhe, Catherine Igel, Ghislaine C Echevarria, Peʼer Dar, Diana Wolfe, Peter S Bernstein, Robert Angert, Ashlesha Dayal, Patience Gallagher, Mara Rosner
OBJECTIVE: To evaluate the relationship between universal transvaginal screening for short cervical length in the second trimester and the timing of antenatal corticosteroids. METHODS: We performed a retrospective cohort study of patients with nonanomalous singleton gestations and spontaneous preterm birth between 24 and 34 weeks of gestation after the initiation of a universal transvaginal cervical length screening program between October 2012 and August 2015. Our primary outcome was antenatal corticosteroid administration to a delivery interval of fewer than 7 days...
June 2017: Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28475099/vaginal-examination-vs-cervical-length-which-is-superior-in-predicting-preterm-birth
#16
Merav Sharvit, Reut Weiss, Yael Ganor Paz, Keren Tzadikevitch Geffen, Netanella Danielli Miller, Tal Biron-Shental
OBJECTIVE: To compare the predictive value of preterm birth (PTB) by transvaginal sonographic cervical length (CL) measurement to digital examination of the cervix (Bishop score - BS), in patients with premature contractions (PC) and intact membranes. DESIGN: A retrospective case-control study. SETTING: Meir Medical Center, Kfar Saba, Israel. POPULATION: Women at 24-34 weeks of gestation who were hospitalized with PC and intact membranes...
February 11, 2017: Journal of Perinatal Medicine
https://www.readbyqxmd.com/read/28454755/pregnancy-outcomes-of-women-admitted-to-a-tertiary-care-centre-with-short-cervix
#17
Alison K Shea, Andrea N Simpson, Jon Barrett, Noor Ladhani, Ori Nevo
OBJECTIVE: Our aim was to characterize the management and outcome of women admitted to a tertiary high-risk obstetrics unit with a short cervix (≤25 mm), measured on transvaginal ultrasound (TVS), and to determine the latency period from diagnosis to delivery. METHODS: A retrospective chart review of women admitted to the High Risk Obstetrics Unit at Sunnybrook Health Sciences Centre between 2005-2011 with an ultrasound-identified short cervix was done. RESULTS: A total of 110 women admitted for a short cervix between 2005-2011 (N = 56 singletons; N = 54 twin gestations) met the inclusion criteria...
May 2017: Journal of Obstetrics and Gynaecology Canada: JOGC, Journal D'obstétrique et Gynécologie du Canada: JOGC
https://www.readbyqxmd.com/read/28418597/mid-trimester-residual-cervical-length-and-the-risk-of-preterm-birth-in-pregnancies-after-abdominal-radical-trachelectomy-a-retrospective-analysis
#18
Y Kasuga, K Miyakoshi, H Nishio, Y Akiba, T Otani, M Fukutake, S Ikenoue, D Ochiai, T Matsumoto, K Tanaka, K Minegishi, N Kuji, R Roberts, D Aoki, M Tanaka
OBJECTIVE: To investigate the association between mid-trimester residual cervical length (CL) and the risk of preterm birth in pregnancies after abdominal radical trachelectomy (RT). DESIGN: Retrospective cohort study. SETTING: University hospital. POPULATION: A total of 33 deliveries after 22 weeks' gestation in 30 women who underwent abdominal RT including prophylactic cervical cerclage and perinatal care between January 2002 and May 2016...
April 18, 2017: BJOG: An International Journal of Obstetrics and Gynaecology
https://www.readbyqxmd.com/read/28399138/short-cervical-lengths-initially-detected-in-mid-trimester-and-early-in-the-third-trimester-in-asymptomatic-twin-gestations-association-with-histologic-chorioamnionitis-and-preterm-birth
#19
Jeong Woo Park, Kyo Hoon Park, Eun Young Jung, Soo-Hyun Cho, Ji Ae Jang, Ha-Na Yoo
OBJECTIVE: To determine whether short cervical lengths (≤20 mm) that were initially detected in mid-trimester and early in the third trimester are independently associated with increased risks of subsequent histologic chorioamnionitis and spontaneous preterm birth (SPTB, defined as a delivery before 34 weeks) in asymptomatic women with twin pregnancies. MATERIAL AND METHODS: This is a prospective study including 292 consecutive asymptomatic women with twin gestations...
2017: PloS One
https://www.readbyqxmd.com/read/28398701/cervical-pessary-for-preventing-preterm-birth-in-singleton-pregnancies-with-short-cervical-length-a-systematic-review-and-meta-analysis
#20
Gabriele Saccone, Andrea Ciardulli, Serena Xodo, Lorraine Dugoff, Jack Ludmir, Giorgio Pagani, Silvia Visentin, Salvatore Gizzo, Nicola Volpe, Giuseppe Maria Maruotti, Giuseppe Rizzo, Pasquale Martinelli, Vincenzo Berghella
OBJECTIVES: To evaluate the effectiveness of cervical pessary for preventing spontaneous preterm birth (SPTB) in singleton gestations with a second trimester short cervix. METHODS: Electronic databases were searched from their inception until February 2016. We included randomized clinical trials (RCTs) comparing the use of the cervical pessary with expectant management in singletons pregnancies with transvaginal ultrasound cervical length (TVU CL) ≤25 mm. The primary outcome was incidence of SPTB <34 weeks...
April 11, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
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