Accuracy of ultrasound beyond 14 weeks to determine chorionicity of twin pregnancies

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dc.contributor.advisorStewart, Chantalen_ZA
dc.contributor.advisorVan Zyl, Hettaen_ZA
dc.contributor.authorMomberg, Zoeen_ZA
dc.date.accessioned2016-09-30T11:34:50Z
dc.date.available2016-09-30T11:34:50Z
dc.date.issued2014en_ZA
dc.description.abstractDetermining the chorionicity of twin pregnancies is extremely important as this influences the frequency of surveillance, timing of delivery and management of complications. Monochorionic twins have 2.5 times the perinatal mortality of dichorionic twins, and in the case of a single intra-uterine fetal demise, the surviving twin of a monochorionic pair is at significant risk of neurological damage compared to a dichorionic pregnancy. Chorionicity can be accurately determined before 14 weeks gestation using the lambda or T-sign. After 14 weeks, these ultrasonographic signs become less reliable and the pregnancy may be assumed to be monochorionic for management purposes. The implication of this assumption is that on occasion premature dichorionic fetuses may be delivered unnecessarily. In South Africa, many women have their first antenatal visit after the first trimester or are not scanned by an experienced sonographer until after 14 weeks. There is thus a need for an accurate means to determine chorionicity in the second and third trimesters.en_ZA
dc.identifier.apacitationMomberg, Z. (2014). <i>Accuracy of ultrasound beyond 14 weeks to determine chorionicity of twin pregnancies</i>. (Thesis). University of Cape Town ,Faculty of Health Sciences ,Department of Obstetrics and Gynaecology. Retrieved from http://hdl.handle.net/11427/22023en_ZA
dc.identifier.chicagocitationMomberg, Zoe. <i>"Accuracy of ultrasound beyond 14 weeks to determine chorionicity of twin pregnancies."</i> Thesis., University of Cape Town ,Faculty of Health Sciences ,Department of Obstetrics and Gynaecology, 2014. http://hdl.handle.net/11427/22023en_ZA
dc.identifier.citationMomberg, Z. 2014. Accuracy of ultrasound beyond 14 weeks to determine chorionicity of twin pregnancies. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Momberg, Zoe AB - Determining the chorionicity of twin pregnancies is extremely important as this influences the frequency of surveillance, timing of delivery and management of complications. Monochorionic twins have 2.5 times the perinatal mortality of dichorionic twins, and in the case of a single intra-uterine fetal demise, the surviving twin of a monochorionic pair is at significant risk of neurological damage compared to a dichorionic pregnancy. Chorionicity can be accurately determined before 14 weeks gestation using the lambda or T-sign. After 14 weeks, these ultrasonographic signs become less reliable and the pregnancy may be assumed to be monochorionic for management purposes. The implication of this assumption is that on occasion premature dichorionic fetuses may be delivered unnecessarily. In South Africa, many women have their first antenatal visit after the first trimester or are not scanned by an experienced sonographer until after 14 weeks. There is thus a need for an accurate means to determine chorionicity in the second and third trimesters. DA - 2014 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 2014 T1 - Accuracy of ultrasound beyond 14 weeks to determine chorionicity of twin pregnancies TI - Accuracy of ultrasound beyond 14 weeks to determine chorionicity of twin pregnancies UR - http://hdl.handle.net/11427/22023 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/22023
dc.identifier.vancouvercitationMomberg Z. Accuracy of ultrasound beyond 14 weeks to determine chorionicity of twin pregnancies. [Thesis]. University of Cape Town ,Faculty of Health Sciences ,Department of Obstetrics and Gynaecology, 2014 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/22023en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentDepartment of Obstetrics and Gynaecologyen_ZA
dc.publisher.facultyFaculty of Health Sciencesen_ZA
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherObstetrics and Gynaecologyen_ZA
dc.titleAccuracy of ultrasound beyond 14 weeks to determine chorionicity of twin pregnanciesen_ZA
dc.typeMaster Thesis
dc.type.qualificationlevelMasters
dc.type.qualificationnameMMeden_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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