Effective April 1, 2011, code G0431QW is deleted from the Clinical Laboratory Fee Schedule (CLFS). Code G0431 describes a high complexity test, and should not be reported with a QW modifier; the QW modifier indicates a Clinical Laboratory Improvement Amendments (CLIA) waived test.
If this occurs with insemination or intercourse that is timed correctly, the egg may become fertilized. It is important to remember, however, that the hCG within the trigger shot will stay in your urine for 7 to 10 days so you may get a false positive on a home pregnancy test. Because of this, most doctors will wait at least two weeks to give you a blood test designed to test for hCG levels.
The difference between the two tests is when they can detect hCG. Blood testing can detect hCG about eight to ten days after ovulation and in most cases urine testing (home pregnancy tests) detect hCG about two weeks after ovulation. The level of hCG is measured with a blood test known as a quantitative test, usually called a âquant betaâ by doctors.