Study on nuchal skin thickness of normal fetal by ultrasonography / 中华超声影像学杂志

ABSTRACT

ObjectiveTo explore ultrasonographic featurs of nuchal skin of normal fetus in its thickness and changes.MethodsThe thickness of nuchal skin of 900 normal fetal was measured by abdominal ultrasound with 7.5 MHz probe.ResultsThe nuchal skin only displayed whole layer before pregnant 27 weeks. After pregnant 27 weeks, the derma and subderma layer was distinguishable, the whole thickness of nuchal skin was ( 1.18 ? 0.05 )mm (10 weeks) to ( 6.01 ? 0.46 )mm (40 weeks) in normal fetus. All layers of nuchal skin were increased proportionally with gestation [r= 0.973 (whole layer), P 0.05 ).Conclusions The abnomal chromosome of fetus could be sifted by the thickness of nuchal skin and the character of sonographic image. It′s a useful diagnostic method for eugenics.