{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,16]],"date-time":"2026-10-16T11:30:54Z","timestamp":1792150254881,"version":"4.4.0"},"reference-count":12,"publisher":"Elsevier BV","issue":"4","license":[{"start":{"date-parts":[[2017,4,1]],"date-time":"2017-04-01T00:00:00Z","timestamp":1491004800000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.elsevier.com\/tdm\/userlicense\/1.0\/"},{"start":{"date-parts":[[2017,4,1]],"date-time":"2017-04-01T00:00:00Z","timestamp":1491004800000},"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":[[2017,4]]},"DOI":"10.1016\/j.ajog.2017.01.011","type":"journal-article","created":{"date-parts":[[2017,1,30]],"date-time":"2017-01-30T02:30:15Z","timestamp":1485743415000},"page":"413.e1-413.e9","update-policy":"https:\/\/doi.org\/10.1016\/elsevier_cm_policy","source":"Crossref","is-referenced-by-count":53,"title":["Obesity and cell-free DNA \u201cno calls\u201d: is there an optimal gestational age at time of sampling?"],"prefix":"10.1016","volume":"216","author":[{"given":"Mary C.","family":"Livergood","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kay A.","family":"LeChien","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Amanda S.","family":"Trudell","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"78","reference":[{"key":"10.1016\/j.ajog.2017.01.011_bib1","doi-asserted-by":"crossref","first-page":"249","DOI":"10.1002\/uog.14791","article-title":"Analysis of cell-free DNA in maternal blood in screening for aneuploidies: meta-analysis","volume":"45","author":"Gil","year":"2015","journal-title":"Ultrasound Obstet Gynecol"},{"key":"10.1016\/j.ajog.2017.01.011_bib2","doi-asserted-by":"crossref","first-page":"662","DOI":"10.1002\/pd.4119","article-title":"Gestational age and maternal weight effects on fetal cell-free DNA in maternal plasma","volume":"33","author":"Wang","year":"2013","journal-title":"Prenat Diagn"},{"key":"10.1016\/j.ajog.2017.01.011_bib3","doi-asserted-by":"crossref","first-page":"816","DOI":"10.1002\/pd.4625","article-title":"Factors affecting levels of circulating cell-free fetal DNA in maternal plasma and their implications for noninvasive prenatal testing","volume":"35","author":"Kinnings","year":"2015","journal-title":"Prenat Diagn"},{"key":"10.1016\/j.ajog.2017.01.011_bib4","doi-asserted-by":"crossref","first-page":"913","DOI":"10.1097\/GIM.0b013e3182368a0e","article-title":"DNA sequencing of maternal plasma to detect Down syndrome: an international clinical validation study","volume":"13","author":"Palomaki","year":"2011","journal-title":"Genet Med"},{"key":"10.1016\/j.ajog.2017.01.011_bib5","doi-asserted-by":"crossref","first-page":"237","DOI":"10.1159\/000337373","article-title":"Fetal fraction in maternal plasma cell-free DNA at 11-13 weeks\u2019 gestation: effect of maternal and fetal factors","volume":"31","author":"Ashoor","year":"2012","journal-title":"Fetal Diagn Ther"},{"key":"10.1016\/j.ajog.2017.01.011_bib6","doi-asserted-by":"crossref","first-page":"210","DOI":"10.1097\/AOG.0000000000000363","article-title":"Single-nucleotide polymorphism-based noninvasive prenatal screening in a high-risk and low-risk cohort","volume":"124","author":"Pergament","year":"2014","journal-title":"Obstet Gynecol"},{"key":"10.1016\/j.ajog.2017.01.011_bib7","doi-asserted-by":"crossref","first-page":"863","DOI":"10.1097\/01.AOG.0000454932.15177.be","article-title":"Committee opinion no. 611","volume":"124","year":"2014","journal-title":"Obstet Gynecol"},{"key":"10.1016\/j.ajog.2017.01.011_bib8","doi-asserted-by":"crossref","first-page":"50","DOI":"10.1214\/aoms\/1177730491","article-title":"On a test of whether one of two random variables is stochastically larger than the other","volume":"18","author":"Mann","year":"1947","journal-title":"Ann Math Stat"},{"key":"10.1016\/j.ajog.2017.01.011_bib9","doi-asserted-by":"crossref","first-page":"87","DOI":"10.1002\/sim.4780040112","article-title":"A\u00a0Wilcoxon-type test for trend","volume":"4","author":"Cuzick","year":"1985","journal-title":"Stat Med"},{"key":"10.1016\/j.ajog.2017.01.011_bib10","doi-asserted-by":"crossref","first-page":"727.e1","DOI":"10.1016\/j.ajog.2015.12.018","article-title":"Cell-free DNA vs sequential screening for the detection of fetal chromosomal abnormalities","volume":"214","author":"Norton","year":"2016","journal-title":"Am J Obstet Gynecol"},{"key":"10.1016\/j.ajog.2017.01.011_bib11","doi-asserted-by":"crossref","first-page":"1056","DOI":"10.1038\/gim.2016.97","article-title":"Noninvasive prenatal screening for fetal aneuploidy, 2016 update: a position statement of the American College of Medical Genetics and Genomics","volume":"18","author":"Gregg","year":"2016","journal-title":"Genet Med"},{"key":"10.1016\/j.ajog.2017.01.011_bib12","doi-asserted-by":"crossref","first-page":"989","DOI":"10.1017\/S1368980011003193","article-title":"Accuracy and reliability of self-reported weight and height in the Sister Study","volume":"15","author":"Lin","year":"2012","journal-title":"Public Health Nutr"}],"container-title":["American Journal of Obstetrics and Gynecology"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/api.elsevier.com\/content\/article\/PII:S0002937817301187?httpAccept=text\/plain","content-type":"text\/plain","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/api.elsevier.com\/content\/article\/PII:S0002937817301187?httpAccept=text\/xml","content-type":"text\/xml","content-version":"vor","intended-application":"text-mining"}],"deposited":{"date-parts":[[2025,9,11]],"date-time":"2025-09-11T11:12:28Z","timestamp":1757589148000},"score":1,"resource":{"primary":{"URL":"https:\/\/linkinghub.elsevier.com\/retrieve\/pii\/S0002937817301187"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2017,4]]},"references-count":12,"journal-issue":{"issue":"4","published-print":{"date-parts":[[2017,4]]}},"alternative-id":["S0002937817301187"],"URL":"https:\/\/doi.org\/10.1016\/j.ajog.2017.01.011","relation":{},"ISSN":["0002-9378"],"issn-type":[{"value":"0002-9378","type":"print"}],"subject":[],"published":{"date-parts":[[2017,4]]},"assertion":[{"value":"Elsevier","name":"publisher","label":"This article is maintained by"},{"value":"Obesity and cell-free DNA \u201cno calls\u201d: is there an optimal gestational age at time of sampling?","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.2017.01.011","name":"articlelink","label":"CrossRef DOI link to publisher maintained version"},{"value":"article","name":"content_type","label":"Content Type"},{"value":"\u00a9 2017 Elsevier Inc. All rights reserved.","name":"copyright","label":"Copyright"}]}}