{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,3]],"date-time":"2026-07-03T08:40:29Z","timestamp":1783068029342,"version":"3.54.6"},"reference-count":67,"publisher":"Elsevier BV","issue":"1","license":[{"start":{"date-parts":[[2018,7,1]],"date-time":"2018-07-01T00:00:00Z","timestamp":1530403200000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.elsevier.com\/tdm\/userlicense\/1.0\/"},{"start":{"date-parts":[[2018,7,1]],"date-time":"2018-07-01T00:00:00Z","timestamp":1530403200000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.elsevier.com\/legal\/tdmrep-license"}],"content-domain":{"domain":["ajog.org","clinicalkey.com","clinicalkey.com.au","clinicalkey.es","clinicalkey.fr","clinicalkey.jp","elsevier.com","sciencedirect.com"],"crossmark-restriction":true},"short-container-title":["American Journal of Obstetrics and Gynecology"],"published-print":{"date-parts":[[2018,7]]},"DOI":"10.1016\/j.ajog.2018.04.031","type":"journal-article","created":{"date-parts":[[2018,4,25]],"date-time":"2018-04-25T14:41:00Z","timestamp":1524667260000},"page":"99.e1-99.e16","update-policy":"https:\/\/doi.org\/10.1016\/elsevier_cm_policy","source":"Crossref","is-referenced-by-count":28,"title":["Cervical pessary to reduce preterm birth &lt;34 weeks of gestation after an episode of preterm labor and a short cervix: a randomized controlled trial"],"prefix":"10.1016","volume":"219","author":[{"given":"Laia","family":"Pratcorona","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Maria","family":"Goya","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Carme","family":"Merced","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Carlota","family":"Rod\u00f3","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Elisa","family":"Llurba","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Teresa","family":"Higueras","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Luis","family":"Cabero","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Elena","family":"Carreras","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Silvia","family":"Ar\u00e9valo","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mayte","family":"Avil\u00e9s","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"In\u00e9s","family":"Calero","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Manel","family":"Casellas","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Marina","family":"Folch","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Andrea","family":"Gasc\u00f3n","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Manel","family":"Mendoza","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"M\u00aa Angeles","family":"Sanchez","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Anna","family":"Suy","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"78","reference":[{"key":"10.1016\/j.ajog.2018.04.031_bib1","doi-asserted-by":"crossref","first-page":"223","DOI":"10.1016\/S0140-6736(12)61856-X","article-title":"Preventing preterm births: analysis of trends and potential reductions with interventions in 39 countries with very high human development index","volume":"381","author":"Chang","year":"2013","journal-title":"Lancet"},{"key":"10.1016\/j.ajog.2018.04.031_bib2","doi-asserted-by":"crossref","first-page":"357","DOI":"10.2471\/BLT.12.111021","article-title":"Recurrence of adverse perinatal outcomes in developing countries","volume":"91","author":"Ouyang","year":"2013","journal-title":"Bull World Health Organ"},{"key":"10.1016\/j.ajog.2018.04.031_bib3","doi-asserted-by":"crossref","first-page":"753","DOI":"10.1056\/NEJM199409223311201","article-title":"School-age outcomes in children with birth weights under 750 g","volume":"331","author":"Hack","year":"1994","journal-title":"N\u00a0Engl J Med"},{"key":"10.1016\/j.ajog.2018.04.031_bib4","first-page":"1","article-title":"Births: final data for 2013","volume":"64","author":"Martin","year":"2015","journal-title":"Natl Vital Stat Rep"},{"key":"10.1016\/j.ajog.2018.04.031_bib5","doi-asserted-by":"crossref","first-page":"130.e1","DOI":"10.1016\/j.ajog.2017.11.554","article-title":"Mortality and pulmonary outcomes of extremely preterm infants exposed to antenatal corticosteroids","volume":"218","author":"Travers","year":"2018","journal-title":"Am J Obstet Gynecol"},{"key":"10.1016\/j.ajog.2018.04.031_bib6","doi-asserted-by":"crossref","first-page":"480.e1","DOI":"10.1016\/j.ajog.2017.05.051","article-title":"Maternal race and intergenerational preterm birth recurrence","volume":"217","author":"Smid","year":"2017","journal-title":"Am J Obstet Gynecol"},{"key":"10.1016\/j.ajog.2018.04.031_bib7","doi-asserted-by":"crossref","first-page":"157.e1","DOI":"10.1016\/j.ajog.2016.10.022","article-title":"Threatened preterm labor is a risk factor for impaired cognitive development in early childhood","volume":"216","author":"Paules","year":"2017","journal-title":"Am J Obstet Gynecol"},{"key":"10.1016\/j.ajog.2018.04.031_bib8","doi-asserted-by":"crossref","first-page":"566.e1","DOI":"10.1016\/j.ajog.2017.07.034","article-title":"Influence of paternal age on perinatal outcomes","volume":"217","author":"Hurley","year":"2017","journal-title":"Am J Obstet Gynecol"},{"key":"10.1016\/j.ajog.2018.04.031_bib9","doi-asserted-by":"crossref","first-page":"310.e1","DOI":"10.1016\/j.ajog.2016.11.1034","article-title":"Modifying the risk of recurrent preterm birth: influence of trimester-specific changes in smoking behaviors","volume":"216","author":"Wallace","year":"2017","journal-title":"Am J Obstet Gynecol"},{"key":"10.1016\/j.ajog.2018.04.031_bib10","doi-asserted-by":"crossref","first-page":"306.e1","DOI":"10.1016\/j.ajog.2016.11.1026","article-title":"Racial\/ethnic differences in preterm perinatal outcomes","volume":"216","author":"Wallace","year":"2017","journal-title":"Am J Obstet Gynecol"},{"key":"10.1016\/j.ajog.2018.04.031_bib11","doi-asserted-by":"crossref","first-page":"164","DOI":"10.1016\/S0140-6736(08)60108-7","article-title":"Primary, secondary, and tertiary interventions to reduce the morbidity and mortality of preterm birth","volume":"371","author":"Iams","year":"2008","journal-title":"Lancet"},{"key":"10.1016\/j.ajog.2018.04.031_bib12","doi-asserted-by":"crossref","first-page":"1325","DOI":"10.1016\/j.ajog.2004.12.055","article-title":"The epidemiology of threatened preterm labor: a prospective cohort study","volume":"192","author":"McPheeters","year":"2005","journal-title":"Am J Obstet Gynecol"},{"key":"10.1016\/j.ajog.2018.04.031_bib13","doi-asserted-by":"crossref","first-page":"477","DOI":"10.1056\/NEJMra050435","article-title":"Prevention of preterm delivery","volume":"357","author":"Simhan","year":"2007","journal-title":"N\u00a0Engl J Med"},{"key":"10.1016\/j.ajog.2018.04.031_bib14","doi-asserted-by":"crossref","first-page":"727","DOI":"10.3109\/14767058.2015.1016420","article-title":"Risk factors for spontaneous preterm delivery after arrested episode of preterm labor","volume":"29","author":"Shmuely","year":"2016","journal-title":"J\u00a0Matern Fetal Neonatal Med"},{"key":"10.1016\/j.ajog.2018.04.031_bib15","doi-asserted-by":"crossref","first-page":"3142","DOI":"10.3109\/14767058.2015.1115477","article-title":"Evaluation of risk factors can help to predict preterm delivery within 7 days in women hospitalized for threatened preterm labor","volume":"29","author":"Raba","year":"2016","journal-title":"J\u00a0Matern Fetal Neonatal Med"},{"key":"10.1016\/j.ajog.2018.04.031_bib16","doi-asserted-by":"crossref","first-page":"e141","DOI":"10.1055\/s-0035-1552930","article-title":"Predictive factors for delivery within 7 days after successful 48-hour treatment of threatened preterm labor","volume":"5","author":"Roos","year":"2015","journal-title":"AJP Rep"},{"key":"10.1016\/j.ajog.2018.04.031_bib17","doi-asserted-by":"crossref","first-page":"793.e1","DOI":"10.1016\/j.ajog.2016.08.012","article-title":"The predictive value of quantitative fibronectin testing in combination with cervical length measurement in symptomatic women","volume":"215","author":"Bruijn","year":"2016","journal-title":"Am J Obstet Gynecol"},{"key":"10.1016\/j.ajog.2018.04.031_bib18","doi-asserted-by":"crossref","first-page":"431","DOI":"10.1016\/j.ajog.2016.04.038","article-title":"Fetal fibronectin testing for prevention of preterm birth in singleton pregnancies with threatened preterm labor: a systematic review and metaanalysis of randomized controlled trials","volume":"215","author":"Berghella","year":"2016","journal-title":"Am J Obstet Gynecol"},{"key":"10.1016\/j.ajog.2018.04.031_bib19","doi-asserted-by":"crossref","first-page":"693.e1","DOI":"10.1016\/j.ajog.2017.09.013","article-title":"Are amniotic fluid neutrophils in women with intraamniotic infection and\/or inflammation of fetal or maternal origin?","volume":"217","author":"Gomez-Lopez","year":"2017","journal-title":"Am J Obstet Gynecol"},{"key":"10.1016\/j.ajog.2018.04.031_bib20","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1016\/j.ajog.2017.04.019","article-title":"Cesarean in the second stage: a possible risk factor for subsequent spontaneous preterm birth","volume":"217","author":"Berghella","year":"2017","journal-title":"Am J Obstet Gynecol"},{"key":"10.1016\/j.ajog.2018.04.031_bib21","doi-asserted-by":"crossref","first-page":"2356","DOI":"10.1080\/14767058.2016.1248934","article-title":"Presentation to delivery interval in women with early preterm delivery presenting with preterm labor: the effect of gestational age","volume":"30","author":"Ashwal","year":"2017","journal-title":"J\u00a0Matern Fetal Neonatal Med"},{"key":"10.1016\/j.ajog.2018.04.031_bib22","doi-asserted-by":"crossref","first-page":"532.e1","DOI":"10.1016\/j.ajog.2014.06.002","article-title":"The role of cervical length in women with threatened preterm labor: is it a valid predictor at any gestational age?","volume":"211","author":"Hiersch","year":"2014","journal-title":"Am J Obstet Gynecol"},{"key":"10.1016\/j.ajog.2018.04.031_bib23","first-page":"CD002255","article-title":"Calcium channel blockers for inhibiting preterm labor and birth","volume":"6","author":"Flenady","year":"2014","journal-title":"Cochrane Database Syst Rev"},{"key":"10.1016\/j.ajog.2018.04.031_bib24","first-page":"CD004452","article-title":"Oxytocin receptor antagonists for inhibiting preterm labor","volume":"6","author":"Flenady","year":"2014","journal-title":"Cochrane Database Syst Rev"},{"key":"10.1016\/j.ajog.2018.04.031_bib25","doi-asserted-by":"crossref","first-page":"16","DOI":"10.1016\/j.ajog.2015.01.054","article-title":"17-alpha-Hydroxyprogesterone caproate for maintenance tocolysis: a systematic review and metaanalysis of randomized trials","volume":"213","author":"Saccone","year":"2015","journal-title":"Am J Obstet Gynecol"},{"key":"10.1016\/j.ajog.2018.04.031_bib26","first-page":"CD000940","article-title":"Magnesium maintenance therapy for preventing preterm birth after threatened preterm labor","volume":"5","author":"Han","year":"2013","journal-title":"Cochrane Database Syst Rev"},{"key":"10.1016\/j.ajog.2018.04.031_bib27","first-page":"CD004071","article-title":"Maintenance therapy with calcium channel blockers for preventing preterm birth after threatened preterm labor","volume":"10","author":"Naik Gaunekar","year":"2013","journal-title":"Cochrane Database Syst Rev"},{"key":"10.1016\/j.ajog.2018.04.031_bib28","first-page":"CD005938","article-title":"Maintenance therapy with oxytocin antagonists for inhibiting preterm birth after threatened preterm labor","volume":"10","author":"Papatsonis","year":"2013","journal-title":"Cochrane Database Syst Rev"},{"key":"10.1016\/j.ajog.2018.04.031_bib29","first-page":"CD004947","article-title":"Prenatal administration of progesterone for preventing preterm birth in women considered to be at risk of preterm birth","volume":"7","author":"Dodd","year":"2013","journal-title":"Cochrane Database Syst Rev"},{"key":"10.1016\/j.ajog.2018.04.031_bib30","doi-asserted-by":"crossref","first-page":"161","DOI":"10.1016\/j.ajog.2017.11.576","article-title":"Vaginal progesterone for preventing preterm birth and adverse perinatal outcomes in singleton gestations with a short cervix: a meta-analysis of individual patient data","volume":"218","author":"Romero","year":"2018","journal-title":"Am J Obstet Gynecol"},{"key":"10.1016\/j.ajog.2018.04.031_bib31","doi-asserted-by":"crossref","first-page":"308","DOI":"10.1002\/uog.15953","article-title":"Vaginal progesterone decreases preterm birth \u2009\u226434 \u2009weeks of gestation in women with a singleton pregnancy and a short cervix: an updated meta-analysis including data from the OPPTIMUM study","volume":"48","author":"Romero","year":"2016","journal-title":"Ultrasound Obstet Gynecol"},{"key":"10.1016\/j.ajog.2018.04.031_bib32","doi-asserted-by":"crossref","first-page":"543","DOI":"10.1016\/j.ajog.2017.04.018","article-title":"Clinical trials and tribulations: 17OHPC and preventing recurrent preterm birth","volume":"216","author":"Young","year":"2017","journal-title":"Am J Obstet Gynecol"},{"key":"10.1016\/j.ajog.2018.04.031_bib33","doi-asserted-by":"crossref","first-page":"B11","DOI":"10.1016\/j.ajog.2017.01.022","article-title":"The choice of progestogen for the prevention of preterm birth in women with singleton pregnancy and prior preterm birth","volume":"216","year":"2017","journal-title":"Am J Obstet Gynecol"},{"key":"10.1016\/j.ajog.2018.04.031_bib34","doi-asserted-by":"crossref","first-page":"80","DOI":"10.1111\/1471-0528.13061","article-title":"Prevention of preterm delivery with vaginal progesterone in women with preterm labor (4P): randomized double-blind placebo-controlled trial","volume":"122","author":"Martinez de Tejada","year":"2015","journal-title":"BJOG"},{"key":"10.1016\/j.ajog.2018.04.031_bib35","doi-asserted-by":"crossref","first-page":"1990","DOI":"10.1111\/1471-0528.13956","article-title":"Vaginal progesterone as maintenance treatment after an episode of preterm labor (PROMISE) study: a multicenter, double-blind, randomized, placebo-controlled trial","volume":"123","author":"Palacio","year":"2016","journal-title":"BJOG"},{"key":"10.1016\/j.ajog.2018.04.031_bib36","doi-asserted-by":"crossref","first-page":"678","DOI":"10.3109\/01443615.2013.820266","article-title":"Progesterone use after successful treatment of threatened pre-term delivery","volume":"33","author":"Areia","year":"2013","journal-title":"J\u00a0Obstet Gynaecol"},{"key":"10.1016\/j.ajog.2018.04.031_bib37","doi-asserted-by":"crossref","first-page":"42560","DOI":"10.1038\/srep42560","article-title":"Cervical pessary for prevention of preterm birth: a meta-analysis","volume":"7","author":"Jin","year":"2017","journal-title":"Sci Rep"},{"key":"10.1016\/j.ajog.2018.04.031_bib38","doi-asserted-by":"crossref","first-page":"1800","DOI":"10.1016\/S0140-6736(12)60030-0","article-title":"Cervical pessary in pregnant women with a short cervix (PECEP): an open-label randomized controlled trial","volume":"379","author":"Goya","year":"2012","journal-title":"Lancet"},{"key":"10.1016\/j.ajog.2018.04.031_bib39","doi-asserted-by":"crossref","first-page":"217","DOI":"10.1046\/j.1469-0705.2001.00369.x","article-title":"Cervical assessment at the routine 23-week scan: standardizing techniques","volume":"17","author":"To","year":"2001","journal-title":"Ultrasound Obstet Gynecol"},{"key":"10.1016\/j.ajog.2018.04.031_bib40","doi-asserted-by":"crossref","first-page":"264","DOI":"10.1016\/S0304-5013(04)76002-1","article-title":"Gestational age-dependent normal values of ultrasonographic measurement of cervical length in the Spanish population","volume":"47","author":"Crispi","year":"2004","journal-title":"Prog Obstet Ginecol"},{"key":"10.1016\/j.ajog.2018.04.031_bib41","doi-asserted-by":"crossref","first-page":"276.e1","DOI":"10.1016\/j.ajog.2015.09.006","article-title":"Efficacy of midtrimester short cervix interventions is conditional on intraamniotic inflammation","volume":"214","author":"Kiefer","year":"2016","journal-title":"Am J Obstet Gynecol"},{"key":"10.1016\/j.ajog.2018.04.031_bib42","doi-asserted-by":"crossref","first-page":"433.e1","DOI":"10.1016\/j.ajog.2010.02.007","article-title":"Patients with an asymptomatic short cervix (<or=15 mm) have a high rate of subclinical intraamniotic inflammation: implications for patient counseling","volume":"202","author":"Vaisbuch","year":"2010","journal-title":"Am J Obstet Gynecol"},{"key":"10.1016\/j.ajog.2018.04.031_bib43","doi-asserted-by":"crossref","first-page":"205","DOI":"10.1002\/uog.8960","article-title":"Sonographic cervical length measurement in pregnant women with a cervical pessary","volume":"38","author":"Goya","year":"2011","journal-title":"Ultrasound Obstet Gynecol"},{"key":"10.1016\/j.ajog.2018.04.031_bib44","series-title":"Applied logistic regression","author":"Hosmer","year":"2000"},{"key":"10.1016\/j.ajog.2018.04.031_bib45","series-title":"Applied survival analysis: regression modeling of time to event data","author":"Hosmer","year":"1999"},{"key":"10.1016\/j.ajog.2018.04.031_bib46","doi-asserted-by":"crossref","first-page":"122","DOI":"10.1515\/JPM.2003.017","article-title":"Is treatment with vaginal pessaries an option in patients with a sonographically detected short cervix","volume":"31","author":"Arabin","year":"2003","journal-title":"J\u00a0Perinat Med"},{"key":"10.1016\/j.ajog.2018.04.031_bib47","doi-asserted-by":"crossref","first-page":"11","DOI":"10.1016\/j.ijgo.2015.06.058","article-title":"A\u00a0systematic review and meta-analysis of progestogen use for maintenance tocolysis after preterm labor in women with intact membranes","volume":"132","author":"Eke","year":"2016","journal-title":"Int J Gynaecol Obstet"},{"key":"10.1016\/j.ajog.2018.04.031_bib48","doi-asserted-by":"crossref","first-page":"390","DOI":"10.1002\/uog.12540","article-title":"Cervical pessaries for prevention of spontaneous preterm birth: past, present and future","volume":"42","author":"Arabin","year":"2013","journal-title":"Ultrasound Obstet Gynecol"},{"key":"10.1016\/j.ajog.2018.04.031_bib49","doi-asserted-by":"crossref","first-page":"1044","DOI":"10.1056\/NEJMoa1511014","article-title":"A\u00a0randomized trial of a cervical pessary to prevent preterm singleton birth","volume":"374","author":"Nicolaides","year":"2016","journal-title":"N\u00a0Engl J Med"},{"key":"10.1016\/j.ajog.2018.04.031_bib50","doi-asserted-by":"crossref","first-page":"1341","DOI":"10.1016\/S0140-6736(13)61408-7","article-title":"Cervical pessaries for prevention of preterm birth in women with a multiple pregnancy (ProTWIN): a multicenter, open-label randomized controlled trial","volume":"382","author":"Liem","year":"2013","journal-title":"Lancet"},{"key":"10.1016\/j.ajog.2018.04.031_bib51","doi-asserted-by":"crossref","first-page":"3.e1","DOI":"10.1016\/j.ajog.2015.08.051","article-title":"Cervical pessary placement for prevention of preterm birth in unselected twin pregnancies: a randomized controlled trial","volume":"214","author":"Nicolaides","year":"2016","journal-title":"Am J Obstet Gynecol"},{"key":"10.1016\/j.ajog.2018.04.031_bib52","doi-asserted-by":"crossref","first-page":"145","DOI":"10.1016\/j.ajog.2015.11.012","article-title":"Cervical pessary to prevent preterm birth in women with twin gestation and sonographic short cervix: a multicenter randomized controlled trial (PECEP-Twins)","volume":"214","author":"Goya","year":"2016","journal-title":"Am J Obstet Gynecol"},{"key":"10.1016\/j.ajog.2018.04.031_bib53","doi-asserted-by":"crossref","first-page":"374.e1","DOI":"10.1016\/j.ajog.2011.07.015","article-title":"A\u00a0systematic review of severe morbidity in infants born late preterm","volume":"205","author":"Teune","year":"2011","journal-title":"Am J Obstet Gynecol"},{"key":"10.1016\/j.ajog.2018.04.031_bib54","doi-asserted-by":"crossref","first-page":"350","DOI":"10.1111\/j.1365-3016.2008.00934.x","article-title":"Associated factors and consequences of late preterm births: results from the 2004 Pelotas birth cohort","volume":"22","author":"Santos","year":"2008","journal-title":"Paediatr Perinat Epidemiol"},{"key":"10.1016\/j.ajog.2018.04.031_bib55","doi-asserted-by":"crossref","first-page":"113","DOI":"10.1016\/j.ajog.2011.10.865","article-title":"The preterm birth syndrome: issues to consider in creating a cervical length classification system","volume":"206","author":"Goldenberg","year":"2012","journal-title":"Am J Obstet Gynecol"},{"key":"10.1016\/j.ajog.2018.04.031_bib56","doi-asserted-by":"crossref","first-page":"461.e1","DOI":"10.1016\/j.ajog.2017.04.029","article-title":"Assessing the potential impact of extending antenatal steroids to the late preterm period","volume":"217","author":"Souter","year":"2017","journal-title":"Am J Obstet Gynecol"},{"key":"10.1016\/j.ajog.2018.04.031_bib57","doi-asserted-by":"crossref","first-page":"1207","DOI":"10.1542\/peds.2006-0018","article-title":"Optimizing care and outcome for late-preterm (near-term) infants: a summary of the workshop sponsored by the National Institute of Child Health and Human Development","volume":"118","author":"Raju","year":"2006","journal-title":"Pediatrics"},{"key":"10.1016\/j.ajog.2018.04.031_bib58","doi-asserted-by":"crossref","first-page":"354.e1","DOI":"10.1016\/j.ajog.2017.05.029","article-title":"The relationship of the subtypes of preterm birth with retinopathy of prematurity","volume":"217","author":"Lynch","year":"2017","journal-title":"Am J Obstet Gynecol"},{"key":"10.1016\/j.ajog.2018.04.031_bib59","doi-asserted-by":"crossref","first-page":"583.e1","DOI":"10.1016\/j.ajog.2017.05.027","article-title":"Cell-free DNA, inflammation, and the initiation of spontaneous term labor","volume":"217","author":"Herrera","year":"2017","journal-title":"Am J Obstet Gynecol"},{"key":"10.1016\/j.ajog.2018.04.031_bib60","doi-asserted-by":"crossref","first-page":"411.e1","DOI":"10.1016\/j.ajog.2016.12.022","article-title":"Neonatal outcomes following preterm birth classified according to placental features","volume":"216","author":"Catov","year":"2017","journal-title":"Am J Obstet Gynecol"},{"key":"10.1016\/j.ajog.2018.04.031_bib61","doi-asserted-by":"crossref","first-page":"316.e1","DOI":"10.1016\/j.ajog.2016.12.018","article-title":"The influence of interpregnancy interval on infant mortality","volume":"216","author":"McKinney","year":"2017","journal-title":"Am J Obstet Gynecol"},{"key":"10.1016\/j.ajog.2018.04.031_bib62","doi-asserted-by":"crossref","first-page":"154","DOI":"10.1186\/s12884-016-0935-7","article-title":"Effectiveness of a cervical pessary for women who did not deliver 48 h after threatened preterm labor (assessment of perinatal outcome after specific treatment in early labor: Apostel VI trial)","volume":"16","author":"Hermans","year":"2016","journal-title":"BMC Pregnancy Childbirth"},{"key":"10.1016\/j.ajog.2018.04.031_bib63","doi-asserted-by":"crossref","first-page":"426","DOI":"10.1002\/uog.12507","article-title":"Arabin cervical pessary in women at high risk of preterm birth: a magnetic resonance imaging observational follow-up study","volume":"42","author":"Cannie","year":"2013","journal-title":"Ultrasound Obstet Gynecol"},{"key":"10.1016\/j.ajog.2018.04.031_bib64","doi-asserted-by":"crossref","first-page":"18","DOI":"10.1186\/2049-2618-2-18","article-title":"The vaginal microbiota of pregnant women who subsequently have spontaneous preterm labor and delivery and those with a normal delivery at term","volume":"2","author":"Romero","year":"2014","journal-title":"Microbiome"},{"key":"10.1016\/j.ajog.2018.04.031_bib65","doi-asserted-by":"crossref","first-page":"6","DOI":"10.1186\/s40168-016-0223-9","article-title":"The interaction between vaginal microbiota, cervical length, and vaginal progesterone treatment for preterm birth risk","volume":"5","author":"Kindinger","year":"2017","journal-title":"Microbiome"},{"key":"10.1016\/j.ajog.2018.04.031_bib66","doi-asserted-by":"crossref","first-page":"B9","DOI":"10.1016\/j.ajog.2017.09.024","article-title":"Research to knowledge: promoting the training of physician-scientists in the biology of pregnancy","volume":"218","author":"Sadovsky","year":"2018","journal-title":"Am J Obstet Gynecol"},{"key":"10.1016\/j.ajog.2018.04.031_bib67","doi-asserted-by":"crossref","first-page":"356.e1","DOI":"10.1016\/j.ajog.2017.05.030","article-title":"Early pregnancy vaginal microbiome trends and preterm birth","volume":"217","author":"Stout","year":"2017","journal-title":"Am J Obstet Gynecol"}],"container-title":["American Journal of Obstetrics and Gynecology"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/api.elsevier.com\/content\/article\/PII:S0002937818303284?httpAccept=text\/xml","content-type":"text\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/api.elsevier.com\/content\/article\/PII:S0002937818303284?httpAccept=text\/plain","content-type":"text\/plain","content-version":"vor","intended-application":"text-mining"}],"deposited":{"date-parts":[[2025,9,11]],"date-time":"2025-09-11T11:18:11Z","timestamp":1757589491000},"score":1,"resource":{"primary":{"URL":"https:\/\/linkinghub.elsevier.com\/retrieve\/pii\/S0002937818303284"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2018,7]]},"references-count":67,"journal-issue":{"issue":"1","published-print":{"date-parts":[[2018,7]]}},"alternative-id":["S0002937818303284"],"URL":"https:\/\/doi.org\/10.1016\/j.ajog.2018.04.031","relation":{},"ISSN":["0002-9378"],"issn-type":[{"value":"0002-9378","type":"print"}],"subject":[],"published":{"date-parts":[[2018,7]]},"assertion":[{"value":"Elsevier","name":"publisher","label":"This article is maintained by"},{"value":"Cervical pessary to reduce preterm birth <34 weeks of gestation after an episode of preterm labor and a short cervix: a randomized controlled trial","name":"articletitle","label":"Article Title"},{"value":"American Journal of Obstetrics and Gynecology","name":"journaltitle","label":"Journal Title"},{"value":"https:\/\/doi.org\/10.1016\/j.ajog.2018.04.031","name":"articlelink","label":"CrossRef DOI link to publisher maintained version"},{"value":"article","name":"content_type","label":"Content Type"},{"value":"\u00a9 2018 Elsevier Inc. All rights reserved.","name":"copyright","label":"Copyright"}]}}