Almost one third of identical twins have their own placenta, inner membrane, and outer membrane. The medical term for these twins is 'dichorionic diamniotic' or ...PRINTSHAREshareviaFacebookshareviaTwittershareviaEmailThereisatotalof5errorsonthisform,detailsarebelow.PleaseenteryournamePleaseenteryouremailYouremailisinvalid.PleasecheckandtryagainPleaseenterrecipient'semailRecipient'semailisinvalid.PleasecheckandtryagainAgreetoTermsrequiredThankyouforsharingourcontent.Amessagehasbeensenttoyourrecipient'semailaddresswithalinktothecontentwebpage.Yourname:isrequiredError:ThisisrequiredYouremail:isrequiredError:ThisisrequiredError:NotavalidvalueSendto:isrequiredError:ThisisrequiredError:NotavalidvalueError:ThisisrequiredIhavereadandagreetotheTermsofUseandPrivacyPolicyisrequired.Therearetwotypesoftwins-fraternaltwinsandidenticaltwins.Findoutmoreaboutthedifferencebetweenthetwotypesandtwin-twintransfusionsyndrome.FraternaltwinsFraternaltwinsareformedfromthefertilisationoftwoeggsbytwodifferentsperm.Theyarealsoknownas'dizygotictwins',or'non-identicaltwins'.Withfraternaltwins,thetwofoetuses(developingbabies)eachhaveaseparateplacenta,innermembrane(theamnion)andoutermembrane(thechorion).Theydon'tusuallylookidenticalandmightormightnotbethesamesex.IdenticaltwinsIdenticaltwinsareformedfromthesplittingofoneembryo.Theyarealsoknownas'monozygotictwins'.Therearedifferenttypesofidenticaltwins,dependingonwhattheyshareinthewomb.Almostonethirdofidenticaltwinshavetheirownplacenta,innermembrane,andoutermembrane.Themedicaltermforthesetwinsis‘dichorionicdiamniotic’orDCDAtwins.Almosttwo-thirdsofidenticaltwinssharethesameplacentaandchorion,buthavetheirownamnion.Theseare‘monochorionicdiamniotic’orMCDAtwins.Therest—onlyabout4%ofidenticaltwins—shareeverything,andarecalled‘monochorionicmonoamniotic’(MCMA)twins.Althoughidenticaltwinsarethesamesexandaregeneticallyidentical,theycandevelopquitedifferentpersonalities.Youcanfindagooddescriptionofthedifferenttypesofmonozygotictwins,withpictures,attheTwinsRes