1 Identify processes and methods for derivatively classifying information. 2  Identify authorized sources to use when derivatively classifying information.  Apply authorized sources to derivatively classify information based on the concepts of contained in, revealed by, and compilation.
Blood Test Can Tell Fetus's Sex at Just 7 Weeks. A simple blood test can determine a baby's gender as early as seven weeks into pregnancy, a new study says â far earlier and far less invasive than other options.
Doctors recommend: 1  Take the pregnancy test 7 days after missed period in regular women or women who use hormonal contraceptives and therefore have a date for when their next period should be. 2  Wait for 21 days to take a pregnancy test after intercourse to be 100% sure of the result if you have a regular menstrual cycle.