{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,20]],"date-time":"2026-09-20T07:40:33Z","timestamp":1789890033689,"version":"4.0.1"},"reference-count":42,"publisher":"Public Library of Science (PLoS)","issue":"5","license":[{"start":{"date-parts":[[2015,5,6]],"date-time":"2015-05-06T00:00:00Z","timestamp":1430870400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["www.plosone.org"],"crossmark-restriction":false},"short-container-title":["PLoS ONE"],"DOI":"10.1371\/journal.pone.0124286","type":"journal-article","created":{"date-parts":[[2015,5,6]],"date-time":"2015-05-06T14:03:10Z","timestamp":1430920990000},"page":"e0124286","update-policy":"https:\/\/doi.org\/10.1371\/journal.pone.corrections_policy","source":"Crossref","is-referenced-by-count":43,"title":["Preterm or Not \u2013 An Evaluation of Estimates of Gestational Age in a Cohort of Women from Rural Papua New Guinea"],"prefix":"10.1371","volume":"10","author":[{"given":"Stephan","family":"Karl","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Connie S. N.","family":"Li Wai Suen","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Holger W.","family":"Unger","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Maria","family":"Ome-Kaius","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Glen","family":"Mola","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lisa","family":"White","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Regina A.","family":"Wangnapi","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Stephen J.","family":"Rogerson","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ivo","family":"Mueller","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"340","published-online":{"date-parts":[[2015,5,6]]},"reference":[{"key":"ref1","article-title":"Weight gain during pregnancy","year":"2009"},{"key":"ref2","first-page":"CD004454","article-title":"Antenatal corticosteroids for accelerating fetal lung maturation for women at risk of preterm birth","author":"D Roberts","year":"2006","journal-title":"Cochrane Database Syst Rev"},{"key":"ref3","doi-asserted-by":"crossref","first-page":"e100247","DOI":"10.1371\/journal.pone.0100247","article-title":"Quantifying Low Birth Weight, Preterm Birth and Small-for-Gestational-Age Effects of Malaria in Pregnancy: A Population Cohort Study","volume":"9","author":"MJ Rijken","year":"2014","journal-title":"PLoS One"},{"key":"ref4","first-page":"663","article-title":"Determinants of low birth weight: methodological assessment and meta-analysis","volume":"65","author":"MS Kramer","year":"1987","journal-title":"Bull World Health Organ"},{"key":"ref5","doi-asserted-by":"crossref","first-page":"168","DOI":"10.1016\/j.pt.2011.01.007","article-title":"Malaria in pregnancy: small babies, big problem","volume":"27","author":"AJ Umbers","year":"2011","journal-title":"Trends Parasitol"},{"key":"ref6","doi-asserted-by":"crossref","first-page":"161","DOI":"10.1179\/174313409X448543","article-title":"Fetal size and dating: charts recommended for clinical obstetric practice","volume":"17","author":"P Loughna","year":"2009","journal-title":"Ultrasound"},{"key":"ref7","doi-asserted-by":"crossref","first-page":"183","DOI":"10.1186\/1475-2875-12-183","article-title":"Gestational age assessment in malaria pregnancy cohorts: a prospective ultrasound demonstration project in Malawi","volume":"12","author":"BJ Wylie","year":"2013","journal-title":"Malar J"},{"key":"ref8","doi-asserted-by":"crossref","first-page":"395","DOI":"10.1002\/uog.7350","article-title":"Obstetric ultrasound scanning by local health workers in a refugee camp on the Thai-Burmese border","volume":"34","author":"MJ Rijken","year":"2009","journal-title":"Ultrasound Obstet Gynecol"},{"key":"ref9","doi-asserted-by":"crossref","first-page":"e34018","DOI":"10.1371\/journal.pone.0034018","article-title":"Refugee and migrant women&apos;s views of antenatal ultrasound on the Thai Burmese border: a mixed methods study","volume":"7","author":"MJ Rijken","year":"2012","journal-title":"PLoS One"},{"key":"ref10","doi-asserted-by":"crossref","first-page":"e44773","DOI":"10.1371\/journal.pone.0044773","article-title":"Development of a fetal weight chart using serial trans-abdominal ultrasound in an East African population: a longitudinal observational study","volume":"7","author":"C Schmiegelow","year":"2012","journal-title":"PLoS One"},{"key":"ref11","doi-asserted-by":"crossref","first-page":"808","DOI":"10.1111\/j.1365-3156.2012.03014.x","article-title":"A review of training opportunities for ultrasonography in low and middle income countries","volume":"17","author":"LN LaGrone","year":"2012","journal-title":"Trop Med Int Health"},{"key":"ref12","doi-asserted-by":"crossref","first-page":"162","DOI":"10.1186\/1475-2875-13-162","article-title":"Antenatal care visit attendance, intermittent preventive treatment during pregnancy (IPTp) and malaria parasitaemia at delivery","volume":"13","author":"JK Anchang-Kimbi","year":"2014","journal-title":"Malar J"},{"key":"ref13","doi-asserted-by":"crossref","first-page":"503","DOI":"10.1098\/rsif.2011.0376","article-title":"Estimation of gestational age from fundal height: a solution for resource-poor settings","volume":"9","author":"LJ White","year":"2012","journal-title":"J R Soc Interface"},{"key":"ref14","doi-asserted-by":"crossref","first-page":"139","DOI":"10.1186\/1475-2875-12-139","article-title":"Impact of malaria during pregnancy on pregnancy outcomes in a Ugandan prospective cohort with intensive malaria screening and prompt treatment","volume":"12","author":"P De Beaudrap","year":"2013","journal-title":"Malar J"},{"key":"ref15","doi-asserted-by":"crossref","first-page":"782","DOI":"10.1136\/adc.44.238.782-b","article-title":"Assessment of gestational age in newborn: a practical scoring system","volume":"44","author":"L Dubowitz","year":"1969","journal-title":"Arch Dis Child"},{"key":"ref16","doi-asserted-by":"crossref","first-page":"417","DOI":"10.1016\/S0022-3476(05)82056-6","article-title":"New Ballard Score, expanded to include extremely premature infants","volume":"119","author":"JL Ballard","year":"1991","journal-title":"J Pediatr"},{"issue":"Suppl 1","key":"ref17","doi-asserted-by":"crossref","first-page":"S2","DOI":"10.1186\/1742-4755-10-S1-S2","article-title":"Born too soon: the global epidemiology of 15 million preterm births","volume":"10","author":"H Blencowe","year":"2013","journal-title":"Reprod Health"},{"key":"ref18","doi-asserted-by":"crossref","first-page":"123","DOI":"10.1016\/j.ijgo.2013.08.012","article-title":"Insights into maternal mortality in Madang Province, Papua New Guinea","volume":"124","author":"JW Bolnga","year":"2014","journal-title":"Int J Gynaecol Obstet"},{"key":"ref19","first-page":"8","article-title":"Neonatal outcome at Modilon Hospital, Madang: a 5-year review","volume":"46","author":"S Jimmy","year":"2003","journal-title":"P N G Med J"},{"key":"ref20","first-page":"58","article-title":"Evaluation of Pacific obstetric and gynaecological ultrasound scanning capabilities, personnel, equipment and workloads","volume":"123","author":"H Kodikara","year":"2010","journal-title":"N Z Med J"},{"key":"ref21","doi-asserted-by":"crossref","first-page":"e93025","DOI":"10.1371\/journal.pone.0093025","article-title":"Factors affecting attendance at and timing of formal antenatal care: results from a qualitative study in Madang, Papua New Guinea","volume":"9","author":"EV Andrew","year":"2014","journal-title":"PLoS One"},{"key":"ref22","doi-asserted-by":"crossref","first-page":"1222","DOI":"10.1016\/j.midw.2013.03.011","article-title":"Exploring women&apos;s perspectives of access to care during pregnancy and childbirth: a qualitative study from rural Papua New Guinea","volume":"29","author":"LM Vallely","year":"2013","journal-title":"Midwifery"},{"key":"ref23","doi-asserted-by":"crossref","first-page":"65","DOI":"10.1080\/02724936.1989.11748600","article-title":"Simple maturity classification of the newborn infant","volume":"9","author":"RA Primhak","year":"1989","journal-title":"Ann Trop Paediatr"},{"key":"ref24","doi-asserted-by":"crossref","first-page":"F135","DOI":"10.1136\/fn.79.2.F135","article-title":"Causes of preterm delivery and intrauterine growth retardation in a malaria endemic region of Papua New Guinea","volume":"79","author":"SJ Allen","year":"1998","journal-title":"Arch Dis Child Fetal Neonatal Ed"},{"key":"ref25","first-page":"12","article-title":"A review of the current state of malaria among pregnant women in Papua New Guinea","volume":"51","author":"I Mueller","year":"2008","journal-title":"P N G Med J"},{"key":"ref26","doi-asserted-by":"crossref","first-page":"9","DOI":"10.1186\/s12916-014-0258-3","article-title":"Sulphadoxine-pyrimethamine plus azithromycin for the prevention of low birthweight in Papua New Guinea: a randomised controlled trial","volume":"13","author":"HW Unger","year":"2015","journal-title":"BMC Med"},{"key":"ref27","doi-asserted-by":"crossref","first-page":"178","DOI":"10.4269\/ajtmh.14-0423","article-title":"Fetal Size in a Rural Melanesian Population with Minimal Risk Factors for Growth Restriction: An Observational Ultrasound Study from Papua New Guinea","volume":"92","author":"HW Unger","year":"2014","journal-title":"Am J Trop Med Hyg"},{"key":"ref28","doi-asserted-by":"crossref","first-page":"497","DOI":"10.1148\/radiology.152.2.6739822","article-title":"Estimating fetal age: computer-assisted analysis of multiple fetal growth parameters","volume":"152","author":"FP Hadlock","year":"1984","journal-title":"Radiology"},{"key":"ref29","doi-asserted-by":"crossref","first-page":"333","DOI":"10.1080\/02724936.1997.11747907","article-title":"Gestational age assessment by nurses in a developing country using the Ballard method, external criteria only","volume":"17","author":"FH Verhoeff","year":"1997","journal-title":"Ann Trop Paediatr"},{"key":"ref30","article-title":"Manual of Standard Managements in Obstetrics and Gynaecology for Doctors, H.E.O.s and Nurses in Papua New Guinea","year":"2012"},{"key":"ref31","article-title":"A Language and Environment for Statistical Computing.: R Foundation for Statistical Computing","year":"2014"},{"key":"ref32","first-page":"332","article-title":"Determining gestational age in a low-resource setting: validity of last menstrual period","volume":"27","author":"RE Rosenberg","year":"2009","journal-title":"J Health Popul Nutr"},{"key":"ref33","doi-asserted-by":"crossref","first-page":"135","DOI":"10.1191\/096228099673819272","article-title":"Measuring agreement in method comparison studies","volume":"8","author":"JM Bland","year":"1999","journal-title":"Stat Methods Med Res"},{"key":"ref34","first-page":"109","article-title":"Gestational assessment of the newborn Melanesian infant","volume":"32","author":"R Primhak","year":"1989","journal-title":"P N G Med J"},{"key":"ref35","doi-asserted-by":"crossref","first-page":"197","DOI":"10.1179\/146532810X12786388978526","article-title":"The external Ballard examination does not accurately assess the gestational age of infants born at home in a rural community of The Gambia","volume":"30","author":"RA Taylor","year":"2010","journal-title":"Ann Trop Paediatr"},{"key":"ref36","first-page":"97","article-title":"Does the modified Ballard method of assessing gestational age perform well in a Zimbabwean population?","volume":"49","author":"SA Feresu","year":"2003","journal-title":"Cent Afr J Med"},{"key":"ref37","doi-asserted-by":"crossref","first-page":"671","DOI":"10.1111\/j.1471-0528.2010.02880.x","article-title":"Malaria in pregnancy: the difficulties in measuring birthweight","volume":"118","author":"MJ Rijken","year":"2011","journal-title":"BJOG"},{"key":"ref38","doi-asserted-by":"crossref","first-page":"48","DOI":"10.1186\/1471-2393-8-48","article-title":"Fetal age assessment based on 2nd trimester ultrasound in Africa and the effect of ethnicity","volume":"8","author":"D Salpou","year":"2008","journal-title":"BMC Pregnancy Childbirth"},{"key":"ref39","doi-asserted-by":"crossref","first-page":"585","DOI":"10.1111\/j.1471-0528.2008.01678.x","article-title":"Expected day of delivery from ultrasound dating versus last menstrual period\u2014obstetric outcome when dates mismatch","volume":"115","author":"M Thorsell","year":"2008","journal-title":"BJOG"},{"key":"ref40","doi-asserted-by":"crossref","first-page":"e31411","DOI":"10.1371\/journal.pone.0031411","article-title":"Ultrasound evidence of early fetal growth restriction after maternal malaria infection","volume":"7","author":"MJ Rijken","year":"2012","journal-title":"PLoS One"},{"key":"ref41","unstructured":"Foundation BaMG (2014) Explore New Ways to Measure Brain Development and Gestational Age."},{"key":"ref42","doi-asserted-by":"crossref","first-page":"73","DOI":"10.1186\/1471-2393-14-73","article-title":"First look: a cluster-randomized trial of ultrasound to improve pregnancy outcomes in low income country settings","volume":"14","author":"EM McClure","year":"2014","journal-title":"BMC Pregnancy Childbirth"}],"container-title":["PLOS ONE"],"original-title":[],"language":"en","link":[{"URL":"http:\/\/dx.plos.org\/10.1371\/journal.pone.0124286","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2018,10,20]],"date-time":"2018-10-20T08:06:56Z","timestamp":1540022816000},"score":1,"resource":{"primary":{"URL":"https:\/\/dx.plos.org\/10.1371\/journal.pone.0124286"}},"subtitle":[],"editor":[{"given":"Claudio Romero Farias","family":"Marinho","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"editor"}]}],"short-title":[],"issued":{"date-parts":[[2015,5,6]]},"references-count":42,"journal-issue":{"issue":"5","published-online":{"date-parts":[[2015,5,6]]}},"URL":"https:\/\/doi.org\/10.1371\/journal.pone.0124286","relation":{},"ISSN":["1932-6203"],"issn-type":[{"value":"1932-6203","type":"electronic"}],"subject":[],"published":{"date-parts":[[2015,5,6]]}}}