{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,20]],"date-time":"2026-02-20T00:47:18Z","timestamp":1771548438513,"version":"3.50.1"},"reference-count":100,"publisher":"Elsevier BV","issue":"10","license":[{"start":{"date-parts":[[2017,10,1]],"date-time":"2017-10-01T00:00:00Z","timestamp":1506816000000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.elsevier.com\/tdm\/userlicense\/1.0\/"},{"start":{"date-parts":[[2017,10,1]],"date-time":"2017-10-01T00:00:00Z","timestamp":1506816000000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.elsevier.com\/legal\/tdmrep-license"}],"content-domain":{"domain":["clinicalkey.com","clinicalkey.com.au","clinicalkey.es","clinicalkey.fr","clinicalkey.jp","jogc.com","elsevier.com","sciencedirect.com"],"crossmark-restriction":true},"short-container-title":["Journal of Obstetrics and Gynaecology Canada"],"published-print":{"date-parts":[[2017,10]]},"DOI":"10.1016\/j.jogc.2017.08.014","type":"journal-article","created":{"date-parts":[[2017,9,19]],"date-time":"2017-09-19T12:35:00Z","timestamp":1505824500000},"page":"e398-e411","update-policy":"https:\/\/doi.org\/10.1016\/elsevier_cm_policy","source":"Crossref","is-referenced-by-count":43,"title":["No. 260-Ultrasound in Twin Pregnancies"],"prefix":"10.1016","volume":"39","author":[{"given":"Lucie","family":"Morin","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kenneth","family":"Lim","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"78","reference":[{"key":"10.1016\/j.jogc.2017.08.014_bib0010","first-page":"207","article-title":"Canadian Task Force on Preventive Health Care. New grades for recommendations from the Canadian Task Force on Preventive Health Care","volume":"169","author":"Woolf","year":"2003","journal-title":"CMAJ"},{"key":"10.1016\/j.jogc.2017.08.014_bib0015","doi-asserted-by":"crossref","first-page":"66","DOI":"10.1097\/00003081-199803000-00012","article-title":"What is the relationship between the universal use of ultrasound, the rate of detection of twins, and outcome differences?","volume":"41","author":"Chasen","year":"1998","journal-title":"Clin Obstet Gynecol"},{"key":"10.1016\/j.jogc.2017.08.014_bib0020","doi-asserted-by":"crossref","first-page":"167","DOI":"10.1046\/j.1469-0705.2000.00072.x","article-title":"Is less intensive fetal surveillance of dichorionic twin gestations justified?","volume":"15","author":"Sherer","year":"2000","journal-title":"Ultrasound Obstet Gynecol"},{"key":"10.1016\/j.jogc.2017.08.014_bib0025","first-page":"931","article-title":"Management of monoamniotic twin pregnancies: a case series and systematic review of the literature","volume":"108","author":"Allen","year":"2001","journal-title":"BJOG"},{"key":"10.1016\/j.jogc.2017.08.014_bib0030","doi-asserted-by":"crossref","first-page":"205","DOI":"10.1055\/s-2006-934091","article-title":"Inpatient versus outpatient management of monoamniotic twins and outcomes","volume":"23","author":"DeFalco","year":"2006","journal-title":"Am J Perinatol"},{"key":"10.1016\/j.jogc.2017.08.014_bib0035","doi-asserted-by":"crossref","first-page":"96","DOI":"10.1016\/j.ajog.2004.06.037","article-title":"Improved perinatal survival of monoamniotic twins with intensive inpatient monitoring","volume":"192","author":"Heyborne","year":"2005","journal-title":"Am J Obstet Gynecol"},{"key":"10.1016\/j.jogc.2017.08.014_bib0040","doi-asserted-by":"crossref","first-page":"329","DOI":"10.1016\/j.clp.2005.02.006","article-title":"Ultrasound in multiple gestations: twins and other multifetal pregnancies","volume":"32","author":"Monteagudo","year":"2005","journal-title":"Clin Perinatol"},{"key":"10.1016\/j.jogc.2017.08.014_bib0045","doi-asserted-by":"crossref","first-page":"415","DOI":"10.7863\/jum.1995.14.6.415","article-title":"Using the number of yolk sacs to determine amnionicity in early first trimester monochorionic twins","volume":"14","author":"Bromley","year":"1995","journal-title":"J Ultrasound Med"},{"key":"10.1016\/j.jogc.2017.08.014_bib0050","doi-asserted-by":"crossref","first-page":"350","DOI":"10.1046\/j.1469-0705.2002.00679.x","article-title":"Chorionicity determination in twin pregnancies: how accurate are we?","volume":"19","author":"Stenhouse","year":"2002","journal-title":"Ultrasound Obstet Gynecol"},{"key":"10.1016\/j.jogc.2017.08.014_bib0055","doi-asserted-by":"crossref","first-page":"6","DOI":"10.1016\/0029-7844(96)00094-4","article-title":"Evaluation of the twin peak or lambda sign in determining chorionicity in multiple pregnancy","volume":"88","author":"Wood","year":"1996","journal-title":"Obstet Gynecol"},{"key":"10.1016\/j.jogc.2017.08.014_bib0060","doi-asserted-by":"crossref","first-page":"1540","DOI":"10.1016\/0002-9378(89)90921-6","article-title":"Ultrasonographic criteria for the prenatal diagnosis of placental chorionicity in twin gestations","volume":"161","author":"Winn","year":"1989","journal-title":"Am J Obstet Gynecol"},{"key":"10.1016\/j.jogc.2017.08.014_bib0065","doi-asserted-by":"crossref","first-page":"557","DOI":"10.1016\/S0002-9378(89)80025-0","article-title":"The ultrasonographic prediction of chorionicity in twin gestation","volume":"160","author":"D'Alton","year":"1989","journal-title":"Am J Obstet Gynecol"},{"key":"10.1016\/j.jogc.2017.08.014_bib0070","doi-asserted-by":"crossref","first-page":"1376","DOI":"10.1016\/0002-9378(95)90619-3","article-title":"Prospective determination of chorionicity, amnionicity, and zygosity in twin gestations","volume":"173","author":"Scardo","year":"1995","journal-title":"Am J Obstet Gynecol"},{"key":"10.1016\/j.jogc.2017.08.014_bib0075","doi-asserted-by":"crossref","first-page":"79","DOI":"10.1046\/j.1469-0705.1997.10020079.x","article-title":"Chorionicity determination in twin pregnancies: double trouble","volume":"10","author":"Sepulveda","year":"1997","journal-title":"Ultrasound Obstet Gynecol"},{"key":"10.1016\/j.jogc.2017.08.014_bib0080","doi-asserted-by":"crossref","first-page":"678","DOI":"10.1016\/S0002-9378(98)70477-6","article-title":"How accurate is fetal biometry in the assessment of fetal age?","volume":"178","author":"Chervenak","year":"1998","journal-title":"Am J Obstet Gynecol"},{"key":"10.1016\/j.jogc.2017.08.014_bib0085","doi-asserted-by":"crossref","first-page":"975","DOI":"10.1016\/j.ajog.2004.06.053","article-title":"First- and second-trimester ultrasound assessment of gestational age","volume":"191","author":"Kalish","year":"2004","journal-title":"Am J Obstet Gynecol"},{"key":"10.1016\/j.jogc.2017.08.014_bib0090","doi-asserted-by":"crossref","first-page":"41","DOI":"10.1046\/j.1469-0705.2000.00004.x","article-title":"Gestational age in pregnancies conceived after in vitro fertilization: a comparison between age assessed from oocyte retrieval, crown-rump length and biparietal diameter","volume":"15","author":"Tun\u00f3n","year":"2000","journal-title":"Ultrasound Obstet Gynecol"},{"key":"10.1016\/j.jogc.2017.08.014_bib0095","doi-asserted-by":"crossref","first-page":"457","DOI":"10.1046\/j.1469-0705.1994.04060457.x","article-title":"Estimation of gestational age by transvaginal sonographic measurement of greatest embryonic length in dated human embryos","volume":"4","author":"Wisser","year":"1994","journal-title":"Ultrasound Obstet Gynecol"},{"key":"10.1016\/j.jogc.2017.08.014_bib0100","doi-asserted-by":"crossref","first-page":"1077","DOI":"10.1016\/j.ajog.2003.09.065","article-title":"First trimester ultrasound screening is effective in reducing postterm labor induction rates: a randomized controlled trial","volume":"190","author":"Bennett","year":"2004","journal-title":"Am J Obstet Gynecol"},{"key":"10.1016\/j.jogc.2017.08.014_bib0105","doi-asserted-by":"crossref","first-page":"82","DOI":"10.1016\/S0029-7844(97)00552-8","article-title":"Intertwin disparity in fetal size in monochorionic and dichorionic pregnancies","volume":"91","author":"Sebire","year":"1998","journal-title":"Obstet Gynecol"},{"key":"10.1016\/j.jogc.2017.08.014_bib0110","doi-asserted-by":"crossref","first-page":"512","DOI":"10.1002\/uog.1966","article-title":"Growth discrepancy in twins in the first trimester of pregnancy","volume":"26","author":"Salomon","year":"2005","journal-title":"Ultrasound Obstet Gynecol"},{"key":"10.1016\/j.jogc.2017.08.014_bib0115","doi-asserted-by":"crossref","first-page":"1156","DOI":"10.1002\/pd.1304","article-title":"First-trimester screening for trisomy 21 in twin pregnancy: does the addition of biochemistry make an improvement?","volume":"25","author":"Gonce","year":"2005","journal-title":"Prenat Diagn"},{"key":"10.1016\/j.jogc.2017.08.014_bib0120","doi-asserted-by":"crossref","first-page":"999","DOI":"10.1111\/j.1471-0528.1996.tb09550.x","article-title":"Screening for trisomy 21 in twin pregnancies by maternal age and fetal nuchal translucency thickness at 10\u201314 weeks of gestation","volume":"103","author":"Sebire","year":"1996","journal-title":"Br J Obstet Gynaecol"},{"key":"10.1016\/j.jogc.2017.08.014_bib0125","first-page":"276","article-title":"Screening for trisomy 21 in twins using first trimester ultrasound and maternal serum biochemistry in a one-stop clinic: a review of three years experience","volume":"110","author":"Spencer","year":"2003","journal-title":"BJOG"},{"key":"10.1016\/j.jogc.2017.08.014_bib0130","doi-asserted-by":"crossref","first-page":"551","DOI":"10.1002\/uog.1897","article-title":"Screening for trisomy 21 in monochorionic twins by measurement of fetal nuchal translucency thickness","volume":"25","author":"Vandecruys","year":"2005","journal-title":"Ultrasound Obstet Gynecol"},{"key":"10.1016\/j.jogc.2017.08.014_bib0135","doi-asserted-by":"crossref","first-page":"146","DOI":"10.1016\/S1701-2163(16)32379-9","article-title":"Prenatal screening for fetal aneuploidy","volume":"29","author":"Summers","year":"2007","journal-title":"J Obstet Gynaecol Can"},{"key":"10.1016\/j.jogc.2017.08.014_bib0140","doi-asserted-by":"crossref","first-page":"86","DOI":"10.1046\/j.1469-0705.1997.10020086.x","article-title":"Increased nuchal translucency thickness at 10\u201314 weeks of gestation as a predictor of severe twin-to-twin transfusion syndrome","volume":"10","author":"Sebire","year":"1997","journal-title":"Ultrasound Obstet Gynecol"},{"key":"10.1016\/j.jogc.2017.08.014_bib0145","doi-asserted-by":"crossref","first-page":"373","DOI":"10.1016\/j.clp.2005.03.001","article-title":"Down syndrome screening in twins","volume":"32","author":"Bush","year":"2005","journal-title":"Clin Perinatol"},{"key":"10.1016\/j.jogc.2017.08.014_bib0150","doi-asserted-by":"crossref","first-page":"63","DOI":"10.1111\/j.1471-0528.1998.tb09352.x","article-title":"The role of ultrasonographic markers for trisomy 21 in women with positive serum biochemistry","volume":"105","author":"Verdin","year":"1998","journal-title":"Br J Obstet Gynaecol"},{"key":"10.1016\/j.jogc.2017.08.014_bib0155","first-page":"267","article-title":"Ultrasound detection of Down syndrome: is it really possible?","volume":"73","author":"Lynch","year":"1989","journal-title":"Obstet Gynecol"},{"key":"10.1016\/j.jogc.2017.08.014_bib0160","doi-asserted-by":"crossref","first-page":"287","DOI":"10.1034\/j.1600-0412.2001.080004287.x","article-title":"Twin pregnancy: the role of ultrasound in management","volume":"80","author":"Sperling","year":"2001","journal-title":"Acta Obstet Gynecol Scand"},{"key":"10.1016\/j.jogc.2017.08.014_bib0165","doi-asserted-by":"crossref","first-page":"202","DOI":"10.1002\/(SICI)1096-8628(19960122)61:3<202::AID-AJMG2>3.0.CO;2-W","article-title":"Twins and twinning","volume":"61","author":"Hall","year":"1996","journal-title":"Am J Med Genet"},{"key":"10.1016\/j.jogc.2017.08.014_bib0170","doi-asserted-by":"crossref","first-page":"43","DOI":"10.1046\/j.1469-0705.1995.06010043.x","article-title":"Predictive value of antepartum ultrasound examination for anomalies in twin gestations","volume":"6","author":"Edwards","year":"1995","journal-title":"Ultrasound Obstet Gynecol"},{"key":"10.1016\/j.jogc.2017.08.014_bib0175","doi-asserted-by":"crossref","first-page":"37","DOI":"10.1159\/000263623","article-title":"Routine examination by ultrasound for the detection of fetal malformations in a low risk population","volume":"6","author":"Brocks","year":"1991","journal-title":"Fetal Diagn Ther"},{"key":"10.1016\/j.jogc.2017.08.014_bib0180","doi-asserted-by":"crossref","first-page":"1047","DOI":"10.1016\/S0002-9378(96)80051-2","article-title":"The preterm prediction study: risk factors in twin gestations. National Institute of Child Health and Human Development Maternal-Fetal Medicine Units Network","volume":"175","author":"Goldenberg","year":"1996","journal-title":"Am J Obstet Gynecol"},{"key":"10.1016\/j.jogc.2017.08.014_bib0185","doi-asserted-by":"crossref","first-page":"7","DOI":"10.1046\/j.1469-0705.2001.00357.x","article-title":"Prediction of preterm delivery in twins by cervical assessment at 23 weeks","volume":"17","author":"Skentou","year":"2001","journal-title":"Ultrasound Obstet Gynecol"},{"key":"10.1016\/j.jogc.2017.08.014_bib0190","doi-asserted-by":"crossref","first-page":"1596","DOI":"10.1067\/mob.2002.127380","article-title":"Cervical length and funneling at 22 and 27 weeks to predict spontaneous birth before 32 weeks in twin pregnancies: a French prospective multicenter study","volume":"187","author":"Vayssiere","year":"2002","journal-title":"Am J Obstet Gynecol"},{"key":"10.1016\/j.jogc.2017.08.014_bib0195","doi-asserted-by":"crossref","first-page":"138","DOI":"10.1002\/uog.1938","article-title":"How to identify twins at low risk of spontaneous preterm delivery","volume":"26","author":"Sperling","year":"2005","journal-title":"Ultrasound Obstet Gynecol"},{"key":"10.1016\/j.jogc.2017.08.014_bib0200","doi-asserted-by":"crossref","first-page":"1103","DOI":"10.1067\/mob.2000.108896","article-title":"Use of cervical ultrasonography in prediction of spontaneous preterm birth in twin gestations","volume":"183","author":"Guzman","year":"2000","journal-title":"Am J Obstet Gynecol"},{"key":"10.1016\/j.jogc.2017.08.014_bib0205","doi-asserted-by":"crossref","first-page":"39","DOI":"10.1046\/j.0001-6349.2001.00466.x","article-title":"The role of sonographic assessment of cervical length in the prediction of preterm birth in primigravidae with twin gestation conceived after infertility treatment","volume":"81","author":"Soriano","year":"2002","journal-title":"Acta Obstet Gynecol Scand"},{"key":"10.1016\/j.jogc.2017.08.014_bib0210","doi-asserted-by":"crossref","first-page":"288","DOI":"10.1046\/j.1469-0705.2000.00087.x","article-title":"Prediction of preterm birth by second trimester cervical sonography in twin pregnancies","volume":"15","author":"Yang","year":"2000","journal-title":"Ultrasound Obstet Gynecol"},{"key":"10.1016\/j.jogc.2017.08.014_bib0215","doi-asserted-by":"crossref","first-page":"856","DOI":"10.1034\/j.1600-0412.2002.810910.x","article-title":"Reference range for cervical length in twin pregnancies","volume":"81","author":"Fujita","year":"2002","journal-title":"Acta Obstet Gynecol Scand"},{"key":"10.1016\/j.jogc.2017.08.014_bib0220","doi-asserted-by":"crossref","first-page":"556","DOI":"10.1002\/uog.150","article-title":"Cervical changes in twin pregnancies observed by transvaginal ultrasound during the latter half of pregnancy: a longitudinal, observational study","volume":"21","author":"Bergelin","year":"2003","journal-title":"Ultrasound Obstet Gynecol"},{"key":"10.1016\/j.jogc.2017.08.014_bib0225","doi-asserted-by":"crossref","first-page":"561","DOI":"10.1002\/uog.1048","article-title":"Prediction of preterm delivery in twin pregnancy: a prospective, observational study of cervical length and fetal fibronectin testing","volume":"23","author":"Gibson","year":"2004","journal-title":"Ultrasound Obstet Gynecol"},{"key":"10.1016\/j.jogc.2017.08.014_bib0230","doi-asserted-by":"crossref","first-page":"256","DOI":"10.1046\/j.1469-0705.2002.00765.x","article-title":"Intra- and interobserver reproducibility of ultrasound measurements of cervical length and width in the second and third trimesters of pregnancy","volume":"20","author":"Valentin","year":"2002","journal-title":"Ultrasound Obstet Gynecol"},{"key":"10.1016\/j.jogc.2017.08.014_bib0235","doi-asserted-by":"crossref","first-page":"357","DOI":"10.1016\/S0029-7844(97)00277-9","article-title":"Transvaginal ultrasound in the prediction of preterm delivery: singleton and twin gestations","volume":"90","author":"Crane","year":"1997","journal-title":"Obstet Gynecol"},{"key":"10.1016\/j.jogc.2017.08.014_bib0240","doi-asserted-by":"crossref","first-page":"42","DOI":"10.1002\/uog.951","article-title":"Sonographic measurement of cervical length in twin pregnancies in threatened preterm labor","volume":"23","author":"Fuchs","year":"2004","journal-title":"Ultrasound Obstet Gynecol"},{"key":"10.1016\/j.jogc.2017.08.014_bib0245","doi-asserted-by":"crossref","first-page":"613","DOI":"10.1016\/j.bpobgyn.2004.04.008","article-title":"Is it normal for multiples to be smaller than singletons?","volume":"18","author":"Blickstein","year":"2004","journal-title":"Best Pract Res Clin Obstet Gynaecol"},{"key":"10.1016\/j.jogc.2017.08.014_bib0250","doi-asserted-by":"crossref","first-page":"114","DOI":"10.1097\/00003081-199803000-00017","article-title":"What are the fetal growth patterns of singletons, twins, and triplets in the United States?","volume":"41","author":"Alexander","year":"1998","journal-title":"Clin Obstet Gynecol"},{"key":"10.1016\/j.jogc.2017.08.014_bib0255","doi-asserted-by":"crossref","first-page":"177","DOI":"10.1053\/siny.2002.0105","article-title":"Normal and abnormal growth of multiples","volume":"7","author":"Blickstein","year":"2002","journal-title":"Semin Neonatol"},{"key":"10.1016\/j.jogc.2017.08.014_bib0260","doi-asserted-by":"crossref","first-page":"39","DOI":"10.1016\/j.ogc.2004.10.006","article-title":"Growth aberration in multiple pregnancy","volume":"32","author":"Blickstein","year":"2005","journal-title":"Obstet Gynecol Clin North Am"},{"key":"10.1016\/j.jogc.2017.08.014_bib0265","unstructured":"American Congress of Obstetricians and Gynecologists. Multiple gestation: complicated twin, triplet, and high-order multifetal pregnancy. ACOG Practice Bulletin no. 56, October 2004."},{"key":"10.1016\/j.jogc.2017.08.014_bib0270","doi-asserted-by":"crossref","first-page":"682","DOI":"10.1016\/S0002-9378(98)70064-X","article-title":"How small is too small in a twin pregnancy?","volume":"179","author":"Hamilton","year":"1998","journal-title":"Am J Obstet Gynecol"},{"key":"10.1016\/j.jogc.2017.08.014_bib0275","doi-asserted-by":"crossref","first-page":"167","DOI":"10.1080\/00016340802649808","article-title":"Early neonatal morbidity and mortality in growth-discordant twins","volume":"88","author":"Alam Machado Rde","year":"2009","journal-title":"Acta Obstet Gynecol Scand"},{"key":"10.1016\/j.jogc.2017.08.014_bib0280","doi-asserted-by":"crossref","first-page":"292","DOI":"10.1375\/twin.9.2.292","article-title":"The relationship between birthweight discordance and perinatal mortality of one of the twins in a twin pair","volume":"9","author":"Kato","year":"2006","journal-title":"Twin Res Hum Genet"},{"key":"10.1016\/j.jogc.2017.08.014_bib0285","first-page":"570","article-title":"The effect of birth weight discordance on twin neonatal mortality","volume":"101","author":"Branum","year":"2003","journal-title":"Obstet Gynecol"},{"key":"10.1016\/j.jogc.2017.08.014_bib0290","first-page":"1006","article-title":"Outcome of twin pregnancies according to intrapair birth weight differences","volume":"94","author":"Hollier","year":"1999","journal-title":"Obstet Gynecol"},{"key":"10.1016\/j.jogc.2017.08.014_bib0295","doi-asserted-by":"crossref","first-page":"955","DOI":"10.1016\/0002-9378(95)90027-6","article-title":"Preterm discordant twins: what birth weight difference is significant?","volume":"172","author":"Cheung","year":"1995","journal-title":"Am J Obstet Gynecol"},{"key":"10.1016\/j.jogc.2017.08.014_bib0300","first-page":"504","article-title":"Birth weight discordance, intrauterine growth retardation and perinatal outcomes in twins","volume":"39","author":"Fraser","year":"1994","journal-title":"J Reprod Med"},{"key":"10.1016\/j.jogc.2017.08.014_bib0305","first-page":"519","article-title":"Management of twin pregnancies. SOGC consensus statement: Part 1. no. 91, July 2000","volume":"22","author":"Barrett","year":"2000","journal-title":"J Soc Obstet Gynaecol Can"},{"key":"10.1016\/j.jogc.2017.08.014_bib0310","first-page":"345","article-title":"The definition, diagnosis, and management of growth- discordant twins: an international census survey","volume":"40","author":"Blickstein","year":"1991","journal-title":"Acta Genet Med Gemellol (Roma)"},{"key":"10.1016\/j.jogc.2017.08.014_bib0315","doi-asserted-by":"crossref","first-page":"34","DOI":"10.1016\/j.ejogrb.2007.08.004","article-title":"First and third trimester ultrasound in the prediction of birthweight discordance in dichorionic twins","volume":"138","author":"Banks","year":"2008","journal-title":"Eur J Obstet Gynecol Reprod Biol"},{"key":"10.1016\/j.jogc.2017.08.014_bib0320","doi-asserted-by":"crossref","first-page":"35","DOI":"10.1016\/j.ejogrb.2004.04.037","article-title":"Sonographic prediction of significant intertwin birth weight discordance","volume":"127","author":"Chang","year":"2006","journal-title":"Eur J Obstet Gynecol Reprod Biol"},{"key":"10.1016\/j.jogc.2017.08.014_bib0325","doi-asserted-by":"crossref","first-page":"759","DOI":"10.1002\/pd.1262","article-title":"Discordant growth in twins","volume":"25","author":"Kingdom","year":"2005","journal-title":"Prenat Diagn"},{"key":"10.1016\/j.jogc.2017.08.014_bib0330","doi-asserted-by":"crossref","first-page":"30","DOI":"10.1046\/j.1469-0705.1992.02010030.x","article-title":"The ultrasonic assessment of discordant growth in twin pregnancies","volume":"2","author":"MacLean","year":"1992","journal-title":"Ultrasound Obstet Gynecol"},{"key":"10.1016\/j.jogc.2017.08.014_bib0335","doi-asserted-by":"crossref","first-page":"118","DOI":"10.1046\/j.1469-0705.2000.00051.x","article-title":"Prediction of discordant twins by real-time ultrasonography combined with umbilical artery velocimetry","volume":"15","author":"Chittacharoen","year":"2000","journal-title":"Ultrasound Obstet Gynecol"},{"key":"10.1016\/j.jogc.2017.08.014_bib0340","doi-asserted-by":"crossref","first-page":"529","DOI":"10.1016\/S0029-7844(97)00010-0","article-title":"Sonographic examination does not predict twin growth discordance accurately","volume":"89","author":"Caravello","year":"1997","journal-title":"Obstet Gynecol"},{"key":"10.1016\/j.jogc.2017.08.014_bib0345","doi-asserted-by":"crossref","first-page":"105","DOI":"10.1159\/000291901","article-title":"Is intertwin birth weight discordance predictable?","volume":"42","author":"Blickstein","year":"1996","journal-title":"Gynecol Obstet Invest"},{"key":"10.1016\/j.jogc.2017.08.014_bib0350","doi-asserted-by":"crossref","first-page":"241","DOI":"10.1159\/000263834","article-title":"Ultrasonic prediction of discordant growth in twin pregnancies","volume":"8","author":"Sayegh","year":"1993","journal-title":"Fetal Diagn Ther"},{"key":"10.1016\/j.jogc.2017.08.014_bib0355","doi-asserted-by":"crossref","first-page":"91","DOI":"10.1016\/0028-2243(91)90098-6","article-title":"How accurate is antenatal sonographic identification of discordant birthweight in twins?","volume":"40","author":"Chamberlain","year":"1991","journal-title":"Eur J Obstet Gynecol Reprod Biol"},{"key":"10.1016\/j.jogc.2017.08.014_bib0360","doi-asserted-by":"crossref","first-page":"197","DOI":"10.1016\/S0301-5629(97)00263-9","article-title":"Fetal biometry and outcome in monochorionic vs. dichorionic twin pregnancies; a retrospective cross- sectional matched-control study","volume":"24","author":"Snijder","year":"1998","journal-title":"Ultrasound Med Biol"},{"key":"10.1016\/j.jogc.2017.08.014_bib0365","first-page":"501","article-title":"The sonographic assessment of twin growth discordancy","volume":"84","author":"Hill","year":"1994","journal-title":"Obstet Gynecol"},{"key":"10.1016\/j.jogc.2017.08.014_bib0370","first-page":"39","article-title":"Birth weight percentiles by gestational age in Canada","volume":"81","author":"Arbuckle","year":"1993","journal-title":"Obstet Gynecol"},{"key":"10.1016\/j.jogc.2017.08.014_bib0375","doi-asserted-by":"crossref","first-page":"593","DOI":"10.1046\/j.1471-0528.2003.02066.x","article-title":"The Doppler assessment in multiple pregnancy randomised controlled trial of ultrasound biometry versus umbilical artery Doppler ultrasound and biometry in twin pregnancy","volume":"110","author":"Giles","year":"2003","journal-title":"BJOG"},{"key":"10.1016\/j.jogc.2017.08.014_bib0380","first-page":"908","article-title":"Screening for fetal growth restriction: a mathematical model of the effect of time interval and ultrasound error","volume":"92","author":"Mongelli","year":"1998","journal-title":"Obstet Gynecol"},{"key":"10.1016\/j.jogc.2017.08.014_bib0385","doi-asserted-by":"crossref","first-page":"1139","DOI":"10.1016\/S0002-9378(99)70096-7","article-title":"Positive predictive value of suspected growth aberration in twin gestations","volume":"181","author":"Grobman","year":"1999","journal-title":"Am J Obstet Gynecol"},{"key":"10.1016\/j.jogc.2017.08.014_bib0390","doi-asserted-by":"crossref","first-page":"456","DOI":"10.1002\/uog.1013","article-title":"Incidence and characteristics of umbilical artery intermittent absent and\/or reversed end-diastolic flow in complicated and uncomplicated monochorionic twin pregnancies","volume":"23","author":"Gratacos","year":"2004","journal-title":"Ultrasound Obstet Gynecol"},{"key":"10.1016\/j.jogc.2017.08.014_bib0395","doi-asserted-by":"crossref","first-page":"772","DOI":"10.1016\/S0143-4004(03)00114-0","article-title":"Transmitted arterio-arterial anastomosis waveforms causing cyclically intermittent absent\/reversed end-diastolic umbilical artery flow in monochorionic twins","volume":"24","author":"Wee","year":"2003","journal-title":"Placenta"},{"key":"10.1016\/j.jogc.2017.08.014_bib0400","doi-asserted-by":"crossref","first-page":"609","DOI":"10.1016\/1071-5576(95)00006-Z","article-title":"Ultrasonic assessment of the amniotic fluid volume in diamniotic twins","volume":"2","author":"Magann","year":"1995","journal-title":"J Soc Gynecol Investig"},{"key":"10.1016\/j.jogc.2017.08.014_bib0405","doi-asserted-by":"crossref","first-page":"579","DOI":"10.1016\/S0889-8545(05)70100-5","article-title":"Amniotic fluid volume assessment in singleton and twin pregnancies","volume":"26","author":"Magann","year":"1999","journal-title":"Obstet Gynecol Clin North Am"},{"key":"10.1016\/j.jogc.2017.08.014_bib0410","doi-asserted-by":"crossref","first-page":"413","DOI":"10.1016\/S0146-0005(05)80018-7","article-title":"Antenatal assessment of twin gestation","volume":"19","author":"Devoe","year":"1995","journal-title":"Semin Perinatol"},{"key":"10.1016\/j.jogc.2017.08.014_bib0415","doi-asserted-by":"crossref","first-page":"122","DOI":"10.1055\/s-2007-994421","article-title":"Sonographic assessment of amniotic fluid in normal twin pregnancy","volume":"12","author":"Watson","year":"1995","journal-title":"Am J Perinatol"},{"key":"10.1016\/j.jogc.2017.08.014_bib0420","doi-asserted-by":"crossref","first-page":"1003","DOI":"10.1016\/S0002-9378(96)70340-X","article-title":"Ultrasonographic measurement of amniotic fluid volume in normal diamniotic twin pregnancies","volume":"174","author":"Chau","year":"1996","journal-title":"Am J Obstet Gynecol"},{"key":"10.1016\/j.jogc.2017.08.014_bib0425","doi-asserted-by":"crossref","first-page":"550","DOI":"10.1038\/sj.jp.7200292","article-title":"Staging of twin-twin transfusion syndrome","volume":"19","author":"Quintero","year":"1999","journal-title":"J Perinatol"},{"key":"10.1016\/j.jogc.2017.08.014_bib0430","doi-asserted-by":"crossref","first-page":"719","DOI":"10.1016\/0002-9378(90)91055-H","article-title":"Survival rates of monoamniotic twins do not decrease after 30 weeks' gestation","volume":"163","author":"Carr","year":"1990","journal-title":"Am J Obstet Gynecol"},{"key":"10.1016\/j.jogc.2017.08.014_bib0435","first-page":"832","article-title":"Monoamniotic twins: a retrospective controlled study","volume":"77","author":"Tessen","year":"1991","journal-title":"Obstet Gynecol"},{"key":"10.1016\/j.jogc.2017.08.014_bib0440","doi-asserted-by":"crossref","first-page":"1046","DOI":"10.1016\/S0002-9378(97)70012-7","article-title":"Monoamniotic twins: improved perinatal survival with accurate prenatal diagnosis and antenatal fetal surveillance","volume":"177","author":"Rodis","year":"1997","journal-title":"Am J Obstet Gynecol"},{"key":"10.1016\/j.jogc.2017.08.014_bib0445","doi-asserted-by":"crossref","first-page":"140","DOI":"10.1046\/j.1469-0705.1999.13020140.x","article-title":"First-trimester cord entanglement in monoamniotic twins","volume":"13","author":"Overton","year":"1999","journal-title":"Ultrasound Obstet Gynecol"},{"key":"10.1016\/j.jogc.2017.08.014_bib0450","doi-asserted-by":"crossref","first-page":"409","DOI":"10.1002\/uog.224","article-title":"Acardiac twin: a systematic review of minimally invasive treatment modalities","volume":"22","author":"Tan","year":"2003","journal-title":"Ultrasound Obstet Gynecol"},{"key":"10.1016\/j.jogc.2017.08.014_bib0455","doi-asserted-by":"crossref","first-page":"907","DOI":"10.1016\/0002-9378(90)91094-S","article-title":"Perinatal outcome of forty-nine pregnancies complicated by acardiac twinning","volume":"163","author":"Moore","year":"1990","journal-title":"Am J Obstet Gynecol"},{"key":"10.1016\/j.jogc.2017.08.014_bib0460","doi-asserted-by":"crossref","first-page":"1310","DOI":"10.1067\/S0002-9378(03)00597-0","article-title":"The management of acardiac twins: a conservative approach","volume":"189","author":"Sullivan","year":"2003","journal-title":"Am J Obstet Gynecol"},{"key":"10.1016\/j.jogc.2017.08.014_bib0465","doi-asserted-by":"crossref","first-page":"459","DOI":"10.1016\/j.ajog.2006.11.039","article-title":"Efficacy of radiofrequency ablation for twin-reversed arterial perfusion sequence","volume":"196","author":"Lee","year":"2007","journal-title":"Am J Obstet Gynecol"},{"key":"10.1016\/j.jogc.2017.08.014_bib0470","doi-asserted-by":"crossref","first-page":"399","DOI":"10.1016\/j.ajog.2007.07.051","article-title":"Intrafetal radiofrequency ablation for twin reversed arterial perfusion (TRAP): a single-center experience","volume":"197","author":"Livingston","year":"2007","journal-title":"Am J Obstet Gynecol"},{"key":"10.1016\/j.jogc.2017.08.014_bib0475","doi-asserted-by":"crossref","first-page":"796","DOI":"10.1002\/pd.1269","article-title":"Acardiac anomaly: current issues in prenatal assessment and treatment","volume":"25","author":"Wong","year":"2005","journal-title":"Prenat Diagn"},{"key":"10.1016\/j.jogc.2017.08.014_bib0480","first-page":"285","article-title":"Conjoined twins in Hungary, 1970\u20131986","volume":"38","author":"Metneki","year":"1989","journal-title":"Acta Genet Med Gemellol (Roma)"},{"key":"10.1016\/j.jogc.2017.08.014_bib0485","doi-asserted-by":"crossref","first-page":"1307","DOI":"10.1001\/jama.289.10.1307","article-title":"Conjoined twins","volume":"289","author":"Spitz","year":"2003","journal-title":"JAMA"},{"key":"10.1016\/j.jogc.2017.08.014_bib0490","series-title":"Multifetal pregnancy: a handbook for the care of the pregnant patient","first-page":"149","author":"Newman","year":"2000"},{"key":"10.1016\/j.jogc.2017.08.014_bib0495","doi-asserted-by":"crossref","first-page":"110","DOI":"10.1097\/00003081-198803000-00013","article-title":"Ultrasound in the management of the twin gestation","volume":"31","author":"Samuels","year":"1988","journal-title":"Clin Obstet Gynecol"},{"key":"10.1016\/j.jogc.2017.08.014_bib0500","doi-asserted-by":"crossref","first-page":"205","DOI":"10.3109\/00016349409023440","article-title":"Twin pregnancies with single fetal death","volume":"73","author":"Prompeler","year":"1994","journal-title":"Acta Obstet Gynecol Scand"},{"key":"10.1016\/j.jogc.2017.08.014_bib0505","doi-asserted-by":"crossref","first-page":"171","DOI":"10.1097\/00006254-198903000-00003","article-title":"Management of a multiple gestation complicated by an antepartum fetal demise","volume":"44","author":"Landy","year":"1989","journal-title":"Obstet Gynecol Surv"}],"container-title":["Journal of Obstetrics and Gynaecology Canada"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/api.elsevier.com\/content\/article\/PII:S170121631730823X?httpAccept=text\/xml","content-type":"text\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/api.elsevier.com\/content\/article\/PII:S170121631730823X?httpAccept=text\/plain","content-type":"text\/plain","content-version":"vor","intended-application":"text-mining"}],"deposited":{"date-parts":[[2025,10,28]],"date-time":"2025-10-28T15:31:45Z","timestamp":1761665505000},"score":1,"resource":{"primary":{"URL":"https:\/\/linkinghub.elsevier.com\/retrieve\/pii\/S170121631730823X"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2017,10]]},"references-count":100,"journal-issue":{"issue":"10","published-print":{"date-parts":[[2017,10]]}},"alternative-id":["S170121631730823X"],"URL":"https:\/\/doi.org\/10.1016\/j.jogc.2017.08.014","relation":{},"ISSN":["1701-2163"],"issn-type":[{"value":"1701-2163","type":"print"}],"subject":[],"published":{"date-parts":[[2017,10]]},"assertion":[{"value":"Elsevier","name":"publisher","label":"This article is maintained by"},{"value":"No. 260-Ultrasound in Twin Pregnancies","name":"articletitle","label":"Article Title"},{"value":"Journal of Obstetrics and Gynaecology Canada","name":"journaltitle","label":"Journal Title"},{"value":"https:\/\/doi.org\/10.1016\/j.jogc.2017.08.014","name":"articlelink","label":"CrossRef DOI link to publisher maintained version"},{"value":"article","name":"content_type","label":"Content Type"},{"value":"Copyright \u00a9 2017 Published by Elsevier Inc. on behalf of The Society of Obstetricians and Gynaecologists of Canada\/La Soci\u00e9t\u00e9 des obst\u00e9triciens et gyn\u00e9cologues du Canada","name":"copyright","label":"Copyright"}]}}