https://www.selleckchem.com/pr....oducts/poly-l-lysine
The present study was performed to examine the utility of a new first trimester marker called the "brain angle" (BA) in screening for trisomy 21. We postulate that differences in the midbrain anatomy between euploid fetuses and those that are affected by trisomy 21 are reflected in changes in BA measurements. In fetuses at 11 -13 weeks of gestations, which were at high risk for trisomy 21, the angle was measured between the line crossing the thalamus and mesencephalon cranial border tangentially and the line crossing the brainstem
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