Asthenosphere Asthenosphere, Layer beneath the lithosphere. The asthenosphere is the layer of our planet that lies beneath the lithosphere. It was first named by J. Barrell, a British geologist when he divided the interior of the Earth into three parts. The lithosphere is the outer layer of the Earth that contains crustal plates.
It is wise, however, to have the test repeated by a different laboratory using a different technique (Western Blot). Mother cats with FIV pass antibody to their kittens whether the kittens become infected or not. So positive test results in kittens do not mean they harbor the virus of FIV. If kittens are positive, they need to be retested every two months until they are six months old to see if the test becomes negative. If the test is still positive at six month, they probably have the disease.
Negative Result After a Miscarriage. Usually a pregnancy test will show negative after a miscarriage, that is, the hormone hCG will be missing from the urine or blood sample that you have given for testing.ositive Result After Miscarriage. Sometimes, even after a miscarriage has occurred, a pregnancy test may appear positive. This is because the hCG does not disappear from the blood immediately. Depending upon how far the pregnancy had progressed, the hCG may take up to 19 days to fall back to zero level.