This rare type of identical twins not only share a placenta, but also share the same amniotic sac (pocket of fluid). They carry a higher risk of complications, such ...Search:Patients&VisitorsServicesAboutUsNews&EventsWorkWithUsEducation&ResearchContact&FindUsGPs&Clinicians'AreaTelephone:02086721255PrivacyandCookiesFindUsContactUsHome>Services>Monochorionicmonoamniotictwins(MCMA)Monochorionicmonoamniotictwins(MCMA)Sub-menuOnthispage:MaincontentThisraretypeofidenticaltwinsnotonlyshareaplacenta,butalsosharethesameamnioticsac(pocketoffluid).Theycarryahigherriskofcomplications,suchasmiscarriage,stillbirth,fetalanomaliesthanidenticaltwins,butalsohaveariskofcordentanglement.Duetothesmallnumbersofthesetwins,thereisinsufficientevidencetoestablishthebestwaytomanagethesetwins,andthatfurtherresearchisrequiredinthisarea.AtStGeorge’s,wehavecollaboratedwithothercentrestoproducealargersampleofthesetwins,inordertoanalysetheiroutcomes,complications,aswellasthebestwaystomanagethesetwinswhentheyarefurthercomplicatedbyselectivefetalgrowthrestriction.Prevalence,AntenatalManagementandPerinatalOutcomeofMonochorionicMonoamnioticTwinPregnancy:ACollaborativeMulticenterStudyinEngland,2000-2013WeightDiscordanceandPerinatalMortalityinMonoamnioticTwinPregnancy:AnalysisofMONOMONO,NorSTAMPandSTORKMultiple-PregnancyCohortsOurValuesPatientsandVisitorsWorkWithUsAboutUsGPandClinicianArea