title: Diagnosing twins in early pregnancy.
abstract: Multiple pregnancy has increased in frequency as a result of the ageing maternal population as well as the advent and wider availability of assisted reproductive technologies. Higher-order pregnancies are associated with increased morbidity and mortality for both the foetuses and mother. The introduction of transvaginal ultrasound has made accurate diagnosis of twin pregnancy, determination of chorionicity and subsequent planning of these high-risk pregnancies a common part of obstetric care. In this article, we critically evaluate the role of transvaginal ultrasound in the diagnosis of twin pregnancies.
authors.affiliation: Acute Gynaecology, Early Pregnancy and Advanced Endosurgery Unit, Nepean Centre for Perinatal Care, Nepean Clinical School, University of Sydney, Sydney, Australia. doctord972@yahoo.com
authors.forename: Dalya
authors.initials: D
authors.lastname: Alhamdan
authors.forename: Shabana
authors.initials: S
authors.lastname: Bora
authors.forename: George
authors.initials: G
authors.lastname: Condous
mesh_terms: D002823:Chorion / Q000000981:diagnostic imaging; D000013:Congenital Abnormalities / Q000000981:diagnostic imaging; D004200:Diseases in Twins / Q000000981:diagnostic imaging*; D005260:Female; D005865:Gestational Age; D006801:Humans; D011247:Pregnancy; D018566:Pregnancy, High-Risk; D012307:Risk Factors; D014427:Twins; D016216:Ultrasonography, Prenatal / Q000379:methods