The JAWSII Full Wrap Fence Brackets attach wood fence rails to metal fence posts, eliminating rotted and failed wood posts. These brackets are designed to use with standard 2-3/8 outer diameter steel tubing.
Synonym(s): head presentation. (in obstetrics) a fetal presentation in which the vertex of the fetus is the part nearest to the cervical os and can be expected to be born first. Compare breech presentation. vertex presentation.
Introduction. Nuchal translucency (NT) is the assessment of the amount of fluid behind the neck of the fetus, also known as the nuchal fold. An anechoic space is visible and measurable sonographically in all fetuses between the 11th and the 14th week of the pregnancy (Figure 1).he findings of numerous studies suggest that an effective first trimester screening for trisomy 21 can be obtained by the combination of maternal age and measurement of fetal NT [ 4 - 11 ]. At a risk cut-off of 1 in100, the detection rate of trisomy 21 is about 75%, at a false positive rate of about 2%.