In the United States Army Special Forces, the motto is traditionally believed to mean to free from oppression or to liberate the oppressed in English. A correct translation of the phrase de oppresso liber would be from (being) an oppressed man, (to being) a free one. The preposition de here means from in the sense of a change from one status to another, not intending separation from the oppressed, but moving from a source in the oppressed.
Qualitative hCG testing detects the presence of hCG and is routinely used to screen for a pregnancy. This test may be performed by a laboratory, at a doctor's office, or at home using a home pregnancy test kit.
The screen should not be confused with screens performed during the second trimester (often known as the Quad Screen or Triple Screen). These screening methods are less accurate and are performed between 15-20 weeks. The blood screen measures two pregnancy related hormones: hCG and PAPP-A.