目的探讨妊娠11~ 14 周, 胎儿颈项透明层厚度(NT)≥ 3mm 时与其染色体异常的相关性.
方法对73 例胎儿颈项透明层厚度≥ 3mm 的孕妇行早期胎儿绒毛或中期羊水穿刺取样 …

Osajulkaisut Valinen, Y., Rapakko, K., Kokkonen, H., Laitinen, P., Tekay, A., Ahola, T., &
Ryynänen, M.(2007). Clinical first-trimester routine screening for Down syndrome in …

Genetic sonography identifies between 60% and 93% of fetuses with trisomy 21. One of the
reasons for the variation in sensitivity is because of the under-detection of congenital heart …

Many studies have shown that a thickened nuchal fold in a second-trimester fetus is a
sonographic sign suggestive of a high risk for Down syndrome. These series have included …

Objective: To determine the distribution of nuchal skinfold thickness in normal and Down
syndrome pregnancies and to evaluate the use of this sonographic measurement as a …

A prospective ultrasound study was performed between 18 and 38 weeks' gestation on 29
fetuses in a high‐risk population, defined by the presence of structural anomalies, in order to …

The first fetal malformation to be detected antenatally by ultrasonography leading to the
termination of pregnancy for medical indication was anencephaly. This chapter provides an …

INTRODUCTION: Antenatal cytogenetic testing was started in Havana in 1984, as a
diagnostic option for fetal chromosome complement. The techniques applied are amniocyte …

OBJECTIVES: The purpose of this study was to determine if antenatal sonographic
determination of fetal ear length is a useful screening method for identification of fetuses with …

Increased fluid collection in the fetal neck during the first trimester of pregnancy is an
important clinical marker for a chromosomal aberration, genetic syndrome, or structural …