Abnormal sonographic appearances of the yolk sac: which can be associated with adverse perinatal outcome?
Med Ultrason
; 16(1): 15-20, 2014 Mar.
Article
em En
| MEDLINE
| ID: mdl-24567919
ABSTRACT
AIMS:
The present study aimed to determine whether yolk sacs with abnormal sonographic appearance are associated with adverse perinatal outcomes in both early and late gestation. MATERIAL ANDMETHODS:
A total of 305 viable singleton pregnancies with gestational age of 6 to 9 weeks were prospectively evaluated with respect to perinatal outcomes and sonographic characteristics of the yolk sacs.RESULTS:
An abnormal yolk sac was found in 66 pregnancies. In pregnancies with enlarged yolk sacs a miscarriage occurred in 37.5% of cases (3/8). The pregnancies with a yolk sac diameter >/= 5 mm had a significantly higher risk of miscarriage (p = 0.005). The risk of miscarriage was statistically similar between the pregnancies with regular and those with irregular yolk sacs (p = 0.73). Miscarriage occurred in 3.8% of pregnancies with irregular yolk sacs (2/52) and none of pregnancies with echogenic yolk sacs (0/6). Adverse perinatal outcomes were not associated with either irregular or echogenic yolk sacs.CONCLUSIONS:
An enlarged yolk sac visualized before the 7th week of gestation is strongly associated with a significantly increased risk for spontaneous miscarriage. The presence of an echogenic or irregular yolk sac appears to be unrelated to adverse perinatal outcome.
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Base de dados:
MEDLINE
Assunto principal:
Saco Vitelino
/
Resultado da Gravidez
/
Aborto Espontâneo
/
Ultrassonografia Pré-Natal
Tipo de estudo:
Diagnostic_studies
/
Etiology_studies
/
Incidence_studies
/
Observational_studies
/
Prognostic_studies
/
Risk_factors_studies
Limite:
Female
/
Humans
/
Pregnancy
País como assunto:
Asia
Idioma:
En
Ano de publicação:
2014
Tipo de documento:
Article