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The only way to confirm a twin or multiple pregnancy is by visually identifying more than one fetus with an ultrasound.

Ultrasound is the only safe and reliable method for the diagnosis and assessment of twins. As the chances of pregnancy complications are increased, your ...HomeAboutUsServicesGynaecologyUltrasoundObstetricsUltrasoundHealthTopicsPost-MenopausalBleedingPainfulPeriodsPainfulIntercourseIrregularCyclesHeavyMenstrualBleedingHeavyMenstrualBleedinginYoungGirlsFertilityConcernsGalleryPoguClinicViewEarlyPregnancyScanFirstTrimesterScreeningFetalAnatomySurveyFetalGrowth&WellBeingCervicalLengthAssessment3D/4DUltrasound&PregnancyPelvicUltrasoundSalineInfusionSonographyHyCoSy/HyFoSySonovaginography(SVG)FAQ’sContactUs“Theincidenceofmultiplepregnanciesisontheincreaseastheincreaseinmaternalageandassistedreproductivetreatment.Multiplepregnanciesoccurinabout2-3%ofallpregnanciesandtwinsmakeupmorethan98%ofallmultiplepregnancies.Ultrasoundistheonlysafeandreliablemethodforthediagnosisandassessmentoftwins.Asthechancesofpregnancycomplicationsareincreased,yourObstetricianwouldarrangeformorescansthannormallyoccurwithsingletonpregnancies.”Whatarethemostcommonindicationsforultrasoundintwinpregnancy?Themostcommonindicationsare:ConfirmationofgestationalageDeterminationofzygosity,chorionicityandamnionicityMeasurementofcervicallengthDiagnosisofanomaliesandcomplicationsPlacentallocalisationAssessmentofgrowthandamnioticfluidWhatiszygosity?Zygosityisthemedicalterminologyusedtoindicatethegenetictypesoftwins.Dizygotictwins(Fraternaltwins)wheretwoeggsarefertilizedinthesamecycle.Monozygotictwins(Identicaltwins)whereasingleeggisfertilizedwhichlaterdividetoformtwofetuses.Duringpregnancyitisoftendifficulttodeterminethezygositywithcertaintyunlessoneisaboyandtheotheragirl.Whatischorionicity?Chorionicityreferstothetypeofplacentationintwins.Itisthecriticalinformationnecessaryfortheantenatalmanagementoftwinpregnancies.Therearetwotypesofplacentationintwins:Dichorionicplacentation(80%oftwins)Monochorionicplacentation(20%oftwins)Dichorionictwinshavetwoseparateplacentaethatmaybewidelyseparatedintheuterusorsituatedclos

As with singleton pregnancies, fetal anomaly scans are recommended at 18–20+6 weeks to identify structural anomalies in twin pregnancies. The ...NCBISkiptomaincontentSkiptonavigationResourcesHowToAboutNCBIAccesskeysMyNCBISignintoNCBISignOutTryoutPMCLabsandtelluswhatyouthink.LearnMore.JournalListUltrasoundv.26(4);2018NovPMC6243450Ultrasound.2018Nov;26(4):193–205.Publishedonline2018Aug22.doi: 10.1177/1742271X18794013PMCID:PMC6243450PMID:30479634Ultrasoundsurveillanceintwinpregnancy:AnupdateforpractitionersRTownsendandAKhalilAuthorinformationArticlenotesCopyrightandLicenseinformationDisclaimerFetalMedicineUnit,St.George'sUniversityofLondon,London,UKAKhalil,FetalMedicineUnit,St.George'sUniversityofLondon,BlackshawRoad,Tooting,London,SW170RE,UK.Emails:ku.ca.lugs@lilahka;moc.liamelgoog@97lilahkamsaReceived2018Mar3;Accepted2018Jun28.Copyright©TheBritishMedicalUltrasoundSociety2018ThisarticlehasbeencitedbyotherarticlesinPMC.Ultrasoundhasrevolutionisedthemanagementofmultiplepregnanciesandtheircomplications.Increasingfrequencyoftwinpregnanciesmandatesfamiliarityofallclinicianswiththerelevantpathologiesandevidence-basedsurveillanceandmanagementprotocolsfortheircare.Inthisreview,wesummarisethelatestevidencerelatingtoultrasoundsurveillanceoftwinpregnanciesincludingfirsttrimesterassessmentandscreening,growthsurveillanceandthedetectionandmanagementofthecomplicationsofmonochorionicpregnanciesincludingtwin-to-twin-transfusionsyndrome,selectivefetalgrowthrestriction,twinreversedarterialperfusionsequenceandconjoinedtwinning.Keywords:Twins,monochorionic,dichorionic,screening,ultrasoundSincetheintroductionofultrasoundintoroutineobstetricpractice,theadvantagesforthemotherscarryingtwinshavemovedbeyondthesimpleabilitytoidentifymultiplepregnanciesantenatallytothepossibilityofscreeningthesepregnanciesbothforthesamepathologiesasthosescreenedforinsingletonpregnancies,aswellastheidentificationandmanagementofthosecomplicationsspecifictotwinpregnancies.1–3Astwinscontinuetoincreaseinfrequency,4rou

Dating (Ultrasound) · Ideal timing: Between 11w0d and 13w6d (45 and 84 mm). Use CRL of the larger twin in spontaneously conceived twins · Note: If ...COVID-19AlertsOB2TUSAtlasTheGenomeGYNGYNSexualHealthPrimaryCareYourPracticeGrandRoundsMyBookshelfNow@ObGMediaAboutUsContactUsLoginObGFirstTogglenavigationCOVID-19AlertsOB2TUSAtlasTheGenomeGYNGYNSexualHealthPrimaryCareYourPracticeGrandRoundsMyBookshelfNow@ObGMediaOBCMECNETwinPregnancy:UltrasoundEvaluationandMonitoringLearningObjectivesandCME/DisclosureInformationThisactivityisintendedforhealthcareprovidersdeliveringcaretowomenandtheirfamilies.Aftercompletingthisactivity,theparticipantshouldbebetterableto:1.Statetheidealtimetodateatwinpregnancyusingultrasound2.DiscussmonitoringoftwinpregnanciesusingultrasoundEstimatedtimetocompleteactivity:0.5hoursFaculty:SusanJ.Gross,MD,FRCSC,FACOG,FACMGPresidentandCEO,TheObGProjectDisclosureofConflictsofInterestPostgraduateInstituteforMedicine(PIM)requiresinstructors,planners,managersandotherindividualswhoareinapositiontocontrolthecontentofthisactivitytodiscloseanyrealorapparentconflictofinterest(COI)theymayhaveasrelatedtothecontentofthisactivity.AllidentifiedCOIarethoroughlyvettedandresolvedaccordingtoPIMpolicy.PIMiscommittedtoprovidingitslearnerswithhighqualityCMEactivitiesandrelatedmaterialsthatpromoteimprovementsorqualityinhealthcareandnotaspecificproprietarybusinessinterestofacommercialinterest.Faculty:SusanJ.Gross,MD,receivesconsultingfeesfromCradleGenomics,andhasfinancialinterestinTheObGProject,Inc.PlannersandManagers:ThePIMplannersandmanagers,TraceHutchison,PharmD,SamanthaMattiucci,PharmD,CHCP,JudiSmelker-Mitchek,MBA,MSN,RN,andJanSchultz,MSN,RN,CHCPhavenothingtodisclose.MethodofParticipationandRequestforCreditFeesforparticipatingandreceivingCMEcreditforthisactivityareaspostedonTheObGProjectwebsite.Duringtheperiodfrom7/1/2019through7/1/2021,participantsmustreadthelearningobjectivesandfacultydisclosuresandstudytheeducationalactivity.Ifyouwishtoreceiveacknowledgmentforcompletingth

HomePregnancy&BirthPregnancyDevelopmentStagesFetalDevelopmentTwins:ACloserLookatYourDevelopingBabiesTwins:ACloserLookatYourDevelopingBabiesByKristenJ.GoughApril27,2010SkipgalleryslidesSavePinMorePreviousViewAllStartSlideshowNextCredit:iStockParents.compartneredwiththeAmericanInstituteofUltrasoundMedicine(AIUM)tocreatethisuniquepeakintoababy'sdevelopmentinsidethewomb.Theseimagesrevealalltheintricatedetailsofababy'sgrowth--fromacollectionofcellstoafull-termnewborn.Whilemostwomenmayonlyreceiveoneortwoultrasoundsduringpregnancy,whichisnormal,thisslideshowofthe3rdtrimesterofpregnancygivesyoualookateachweekofdevelopment.StartSlideshow1of13SavePinMoreFacebookTweetEmailSendTextMessageWeek6(4weeksfromconception)twinsultrasoundweek6Credit:AmericanInstituteofUltrasoundinMedicine-AIUM.orgFetalsize:Length,1/6to1/4ofaninch,crowntorump.Weight,stilltoosmalltomeasure.Fetaldevelopmentmilestones:Thisweekthebabiesareregisteringfetalheartbeats.Bloodispumpingthroughtheirhearts.Therearenowtwodistinctamnioticsacsandthetwins'heads,legs,andumbilicalcordsareforming.Whatyou'reseeing:Althoughthismaynotlooklikemuch,thesecirclesshowtwodistinctgestationalsacs--twins!Withasinglepregnancy,onlyonesacwouldappearonthescreen.Here,thesonographer(ultrasoundtechnician)hasidentifiedeachbaby-to-be,onemarkedAA,theotherBB.Mostexpectantmothersreceiveseveralultrasoundsduringatwinpregnancytoensurethatbothbabiesaregrowingproperlyandthepregnancyisprogressingnormally.Yourunbornbabieswillgrowatthesamerateaswithasinglepregnancy--buttimestwo.Readmoreaboutyourbabiesinweeksix.1of13ViewAllAdvertisementAdvertisement2of13SavePinMoreFacebookTweetEmailSendTextMessageWeek11(9weeksfromconception)twinsultrasoundweek11Credit:AmericanInstituteofUltrasoundinMedicine-AIUM.orgFetalsize:Length,1.61inches,crowntorump.Weight,0.25ounces.Fetaldevelopmentmilestones:Lotsoflittlearmsandlegsaregrowingandelongatingthisweek!Facialfeaturesaredeveloping,asarefingersandtoes.Whatyou'reseeing:Just11weeksintoyourpregnancy,ninefromconception,yourunbor