| | First Trimester Testing or Integrated Screening Offered Through Warde Medical Laboratory (Site not responding. Last check: 2007-11-02) |
 | | However, testing is now available during the first trimester, and the integrated test, which requires testing both in the first and second trimester, recently has been shown to be the most specific and sensitive method (Wald; Wapner). |
 | | One negative feature of the integrated test is that because it requires assays during both the first and second trimester, there is a delay of over a month in most cases between the first sample and when the results are reported to the patient. |
 | | Another concern is that since the results of the first trimester testing are not independently provided to the pregnant woman, those who would test positive for carrying a Down syndrome fetus cannot avail themselves of the accurate, but invasive chorionic villus sampling (CVS) procedure that is done only in the first trimester. |
| www.wardelab.com /arc_15-1.html (2767 words) |