title: [Umbilical flowmetry in twin pregnancy. A method for identifying discordant fetal growth?].
abstract: Umbilical artery velocimetry was performed in 33 twin gestations to evaluate the predictivity of the test (umbilical artery S/D difference between the pair > 0.4) in the screening of discordant fetal growth. Four out of 10 cases of discordant fetal growth were identified by the test and it was abnormal in 1 out of 23 concordant twins. The sensitivity was 40%, specificity 95%, positive predictive value 80% and negative predictive value of 79%. In spite of its low sensitivity the test can be useful in detecting discordant fetal growth in twin pregnancies.
authors: Serviço de Obstetricia e Ginecologia, Hospital de Santa Maria, Faculdade de Medicina de Lisboa.
authors: N
authors: N
authors: Clode
authors: E
authors: E
authors: Casal
authors: L M
authors: LM
authors: Graça
mesh_terms: D001724:Birth Weight; D005314:Embryonic and Fetal Development; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D011237:Predictive Value of Tests; D011247:Pregnancy; D012680:Sensitivity and Specificity; D014427:Twins; D016216:Ultrasonography, Prenatal; D014469:Umbilical Arteries / Q000000981:diagnostic imaging
vernacular_title: Fluxometria umbilical na gravidez gemelar. Um método de identificação de crescimento fetal discordante?