[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-446404-105":59,"doc-detail-446404-en":131},{"code":4,"msg":5,"data":6},0,"success",[7,13,18,23,28,33,38,43,48,51,55],{"id":8,"doc_module":4,"doc_module_name":9,"category_name":10,"show_sort_weight":11,"slug":12},1,"Document","Story & Novel",90,"story-novel",{"id":14,"doc_module":4,"doc_module_name":9,"category_name":15,"show_sort_weight":16,"slug":17},2,"Literature",80,"literature",{"id":19,"doc_module":4,"doc_module_name":9,"category_name":20,"show_sort_weight":21,"slug":22},4,"Exam",70,"exam",{"id":24,"doc_module":4,"doc_module_name":9,"category_name":25,"show_sort_weight":26,"slug":27},5,"Comic",60,"comic",{"id":29,"doc_module":4,"doc_module_name":9,"category_name":30,"show_sort_weight":31,"slug":32},6,"Technology",50,"technology",{"id":34,"doc_module":4,"doc_module_name":9,"category_name":35,"show_sort_weight":36,"slug":37},7,"Healthcare",40,"healthcare",{"id":39,"doc_module":4,"doc_module_name":9,"category_name":40,"show_sort_weight":41,"slug":42},8,"Research & Report",30,"research-report",{"id":44,"doc_module":4,"doc_module_name":9,"category_name":45,"show_sort_weight":46,"slug":47},9,"Religion & Spirituality",20,"religion-spirituality",{"id":46,"doc_module":4,"doc_module_name":9,"category_name":49,"show_sort_weight":46,"slug":50},"World Cup","world-cup",{"id":52,"doc_module":4,"doc_module_name":9,"category_name":53,"show_sort_weight":52,"slug":54},10,"Lifestyle","lifestyle",{"id":56,"doc_module":4,"doc_module_name":9,"category_name":57,"show_sort_weight":24,"slug":58},19,"General","general",{"code":4,"msg":60,"data":61},"ok",{"site_id":62,"language":63,"slug":64,"title":65,"keywords":66,"description":67,"schema_data":68,"social_meta":124,"head_meta":126,"extra_data":128,"updated_unix":130},105,"en","isuog-practice-guidelines-updated-role-of-ultrasound-in-twin-pregnancy","ISUOG Practice Guidelines (updated) - role of ultrasound in twin pregnancy","","ISUOG Practice Guidelines (updated) address how ultrasound should be used in the care of uncomplicated twin pregnancies and those complicated by TTTS, selective FGR, TAPS, TRAP sequence, conjoined twins, and single intrauterine death. The guidance covers dating and chorionicity assessment, detection of aneuploidy and structural abnormalities, screening and diagnosis of growth discordance and preterm birth risk, and management pathways for key monochorionic-specific complications such as TTTS and TAPS.",{"@graph":69,"@context":123},[70,84,106],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":35,"@type":76,"position":81},"https://docshare.wps.com/document/healthcare/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/isuog-practice-guidelines-updated-role-of-ultrasound-in-twin-pregnancy/446404/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/isuog-practice-guidelines-updated-role-of-ultrasound-in-twin-pregnancy/446404.png","ImageObject",300,407,{"name":92,"@type":93},"CatatanPagi","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-11-08","2026-09-29",true,{"@type":102,"interactionType":103,"userInteractionCount":105},"InteractionCounter",{"@type":104},"ViewAction",18,{"@type":107,"mainEntity":108},"FAQPage",[109,115,119],{"name":110,"@type":111,"acceptedAnswer":112},"What twin conditions are covered by the ISUOG ultrasound guidance?","Question",{"text":113,"@type":114},"The guidance covers uncomplicated twin pregnancies and those complicated by TTTS, selective FGR, TAPS, TRAP sequence, conjoined twins, and single intrauterine death.","Answer",{"name":116,"@type":111,"acceptedAnswer":117},"How does the guideline recommend ultrasound to assess pregnancy dating and placental characteristics?",{"text":118,"@type":114},"Ultrasound is used to determine gestational age and to assess chorionicity and amnionicity, supporting appropriate monitoring and risk evaluation.",{"name":120,"@type":111,"acceptedAnswer":121},"What are the main ultrasound screening and diagnostic priorities in twin pregnancy?",{"text":122,"@type":114},"Key priorities include screening for aneuploidy and structural abnormalities, evaluating fetal growth and Doppler parameters, diagnosing discordant twin pregnancy, and screening for the risk of preterm birth and FGR.","https://schema.org",{"og:url":83,"og:type":125,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":127,"canonical":83},"index,follow",{"doc_id":129,"site_id":62},446404,1790764694,{"code":4,"msg":5,"data":132},{"doc_id":129,"user_id":133,"nickname":92,"user_avatar":134,"doc_module":4,"category_id":34,"category_name":35,"doc_title":65,"doc_description":67,"doc_content":135,"file_id":136,"file_url":137,"file_type":138,"file_size":139,"view_count":105,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":140,"language":141,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":142,"faqs":143,"seo_title":144,"seo_description":67,"update_tm":145,"read_time":26,"preview_page_count":4},962090894170,"https://ap-avatar.wpscdn.com/davatar_6f874abed73319feea01a86fa6f0fab8","Ultrasound Obstet Gynecol 2025  \nPublished online in Wiley Online Library ([wileyonlinelibrary.com](wileyonlinelibrary.com)). DOI: 10.1002/uog.29166.  \nThis is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.  \nisuog GUIDELINES  \nISUOG Practice Guidelines (updated): role of ultrasound in twin pregnancy  \nClinical Standards Committee  \nThe International Society of Ultrasound in Obstetricsand Gynecology (ISUOG) is a scientific organization that encourages sound clinical practice, and high-quality teaching and research, related to diagnostic imaging in women’s healthcare. The ISUOG Clinical Standards Committee (CSC) has the remit to develop Practice Guidelines and Consensus Statements as educational recommendations that provide healthcare practitioners with a consensus-based approach, from experts, for diagnostic imaging. They are intended to reflect what is considered by ISUOG to be the best practice at the time at which they are issued. Although ISUOG has made every effort to ensure that Guidelines are accurate when issued, neither the Society nor any of its employees or members accepts any liability for the consequences of any inaccurate or misleading data, opinions or statements issued by the CSC. The ISUOG CSC documents are not intended to establish a legal standard of care because interpretation of the evidence that underpins the Guidelines may be influenced by individual circumstances, local protocol and available resources. Approved Guidelines can be distributed freely with the permission of ISUOG ([info@isuog.org](info@isuog.org) ).  \nINTRODUCTION  \nThe incidence of multiple pregnancy has increased over the years, mainly due to delayed childbirth and advanced maternal age at conception and the resultant widespread use of assisted reproduction techniques1. In addition to often involving the transfer of more than one embryo, in-vitro fertilization increases the frequency of monozygotic twinning2. The twin birth rate was reported to have increased in the USA by just under 70% between 1980 (19 per 1000 live births) and 2020 (31 per 1000 live births)3 , though other reports demonstrated a decline in the twin birth between 2014 and 2018 in both the USA and UK4.  \nTwin pregnancy is associated with a high risk of perinatal mortality and morbidity5–8. There is also an increased  \nrisk of maternal complications, such as hypertensive disorders of pregnancy9. In 2019, the stillbirth rate was 7 .6 per 1000 twin births compared with 3.8 per 1000 singleton births10. Preterm birth prior to 37weeks’ gestation occurs in up to 60% of multiple pregnancies, while the risk of very preterm birth prior to 32weeks is 10 times higher in twin compared with singleton pregnancies (10% vs 1%), contributing to the increased risk of neonatal mortality and long-term morbidity11–14. Compared with singleton pregnancies, twin pregnancies are at increased risk ofiatrogenic preterm birth due to the greater incidence of maternal and fetal complications. This risk is significantly higher in monochorionic compared with dichorionic pregnancy5–8. Yet, multiple pregnancies are often excluded from research studies, with only 8% of trials on fetal growth restriction (FGR), 17% of those on pre-eclampsia and 2% of those on diabetes including multiple pregnancies15. Moreover, the majority of recommendations in national and international guidelines for the management of multiple pregnancy lack high-quality robust supporting evidence16.  \nUltrasound assessment of chorionicity, fetal biometry, anatomy, Doppler velocimetry and amniotic fluid volume is used to identify and monitor twin pregnancies at risk of adverse outcomes, such as twin-to-twin transfusion syndrome (TTTS) and FGR. As in singletons, impaired fetal growth can be assessed in twins by comparing biometry and Doppler velocimetry parameters against standards for uncomplicate","cbCaij9azvsLvT0v","https://ap.wps.com/l/cbCaij9azvsLvT0v","pdf",631405,24,"English","# Outline/Scope\n## Dating of the pregnancy (determining gestational age)\n## Determining chorionicity and amnionicity\n## Twin labeling\n## Timing, frequency and content of ultrasound assessment\n## Screening for aneuploidy\n## Prenatal diagnosis of aneuploidy\n## Screening for structural abnormalities\n## Diagnosis and management of discordant twin pregnancy\n## Screening for the risk of preterm birth\n## Screening, diagnosis and management of FGR\n## Management of twin pregnancy complicated by single IUD\n## Complications unique to monochorionic twin pregnancy\n## Screening, diagnosis, staging and management of TTTS\n## Screening, diagnosis and management of TAPS\n## Management of TRAP sequence\n## Management of monochorionic monoamniotic (MCMA) twin pregnancy\n## Diagnosis and management of conjoined twins","[{\"question\":\"What twin conditions are covered by the ISUOG ultrasound guidance?\",\"answer\":\"The guidance covers uncomplicated twin pregnancies and those complicated by TTTS, selective FGR, TAPS, TRAP sequence, conjoined twins, and single intrauterine death.\"},{\"question\":\"How does the guideline recommend ultrasound to assess pregnancy dating and placental characteristics?\",\"answer\":\"Ultrasound is used to determine gestational age and to assess chorionicity and amnionicity, supporting appropriate monitoring and risk evaluation.\"},{\"question\":\"What are the main ultrasound screening and diagnostic priorities in twin pregnancy?\",\"answer\":\"Key priorities include screening for aneuploidy and structural abnormalities, evaluating fetal growth and Doppler parameters, diagnosing discordant twin pregnancy, and screening for the risk of preterm birth and FGR.\"}]","ISUOG Practice Guidelines (updated) - role of ultrasound in twin pregnancy | PDF",1790715301]