Sonographic determination of first trimester twin chorionicity and amnionicity.
J Clin Ultrasound
; 24(6): 305-8, 1996.
Article
de En
| MEDLINE
| ID: mdl-8792270
ABSTRACT
OBJECTIVE:
To determine the reliability of first trimester sonography in the detection of twin chorionicity and amnionicity. MATERIALS ANDMETHODS:
Sets of twins (179) were evaluated sonographically in the first trimester. Chorionicity was determined by identifying the number of gestational sacs. The presence or absence of an amnion about each embryo/fetus was also recorded. The placentas for each case were evaluated to determine chorionicity and amnionicity.RESULTS:
Of the 179 twin pairs, 158 were dichorionic/diamniotic; 19 were monochorionic/diamniotic, and two pairs were monochorionic/monoamniotic. Chorionicity and amnionicity were correctly determined in each case.CONCLUSION:
The chorionicity of twin pregnancies can be determined from the time that the gestational sacs are visualized within the uterus. Transvaginal sonography can reliably determine the amnionicity of monochorionic twin pregnancies after 7 weeks, menstrual age.
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Collection:
01-internacional
Base de données:
MEDLINE
Sujet principal:
Grossesse multiple
/
Chorion
/
Échographie prénatale
Type d'étude:
Diagnostic_studies
Limites:
Female
/
Humans
/
Newborn
/
Pregnancy
Langue:
En
Journal:
J Clin Ultrasound
Année:
1996
Type de document:
Article
Pays d'affiliation:
États-Unis d'Amérique