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1、AbnormalUmbilicalCord LiquorVolumeAbnormality PrematureDelivery PrematureRuptureofMembrane ProlongedPregnancy,MultiplePregnancyWomenHospital,SchoolofMedical,ZheJiangUniversityWangZhengPingAbnormalUmbilicalCordAbnormalcordlengthCordentanglementKnotofcord
2、TorsionofcordAbnormalcordinsertionCordpresentationandcordprolapseSingleumbilicalarteryAbnormalcordlengthNormalcordlengthis30-70cm,averagely55cmShortcord:<30cmisdefinedasshortcord,mayleadtofetaldistress,placentalabruptio,prolongedlabourLongcord:>80cmisde
3、finedaslongcord,higheroccurrenceofcordaroundneck,cordaroundbody,cordknot,cordprolapseandcordcompressionAbnormalcordinsertionMarginalcordinsertionintoplacenta,knownasracketplacentaCordinsertionontomembrane,runsbetweenchorionicmembraneandamnioticmembraneb
4、eforeinsertingintoplacenta,knownasvelamentouscordinsertionBloodvesselsonmembranepassinginternalcervicalosanteriortofetalpresentingpart,knownasvasapreviaVelamentouscordinsertion,commonlyseenwithsingleumbilicalarteryInvasapreviarupture,bloodlossof200-300m
5、lcanleadtofetaldemisevelamentouscordinsertionvelamentouscordinsertionCordpresentationandCordprolapseCordlocatedanteriororlateraltofetalpresentingpart,knownascordpresentation,alsoknownasoccultcordprolapseAtmembranerupture,cordprolapseoutofcervicalos,desc
6、endingintovagina,knownascordprolapseCordprolapseislife-threateningtothefetusCordpresentationCordprolapseKnotofcordCordentanglementCordentanglementAbnormalLiquorVolumePolyhydramniosOligohydramniosPolyhydramniosDefinedasamnioticfluidvolumemorethan2000mlat
7、anyperiodofgestationIncidence0.5%-1.6%Ifamnioticfluidvolumeincreaseprogressivelyovermonths,thesymptomsareusuallymilder,knownaschronicpolyhydramniosIfamnioticfluidvolumeincreaserapidlyoverdays,cancausseseverecompressionsymptoms,knownasacutepolyhydramnios
8、Fetalstructuraldeformity:(neuraltubedefect,NTD)UltrasoundexaminationAmnioticfluidindex,AFI>18cmorAFI>20cmDepthoflargestamnioticfluidpool(amnioticfluidvolume,AFV)>=7cmAFV8-11cm,asmildpolyhydramniosAFV12-15cm,asmoderatepolyhydramni
