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.
Blood tests which test the exact level of Hcg in the a womanâs system are the most accurate and are right nearly 100% of the time. If a pregnancy test after IVF is negative, but no menstrual period comes after several weeks, a second test may be given.False negatives are fairly common when using urine tests and are usually the result of testing too early.lood tests which test the exact level of Hcg in the a womanâs system are the most accurate and are right nearly 100% of the time. If a pregnancy test after IVF is negative, but no menstrual period comes after several weeks, a second test may be given.