David K. Stevenson, the principal investigator of the March of Dimes Prematurity Research Center at Stanford University, described the non-invasive blood test approach as a way of "eavesdropping on a conversation" between the mother, the fetus and the placenta, without disturbing the pregnancy. He...
False-negative test results: A negative hCG blood pregnancy test means you are not pregnant. However, if the test is performed too early in pregnancy, the levels are not high enough to be detected. A false-negative test result shows that a woman isn't pregnant when in fact, she is. It...
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A blood test involves taking blood from you to test for the level of a naturally occurring component (chemical or cell) or the presence of a chemical or cell not usually found in the body.
Dr. Brian Skotko, a physician with the Down Syndrome Program at Children's Hospital Boston, said the test's accuracy is "pretty good," although the studies didn't test as many samples as Sequenom did for its test. Several other companies are developing prenatal tests for Down syndrome, said...
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Time your blood test wisely Knowing when to schedule a blood test can impact the accuracy of your results. For a clearer picture of your overall health, consider discussing the timing of your blood test with your doctor to ensure it falls outside the window that might be affected by your ...
though the results are wrong as much as 40 percent of the time. Most pregnant women in the United States get an ultrasound between 18 and 22 weeks of pregnancy that looks for fetal anomalies. At that point, the fetus' sex can be determined with high accuracy. [5 Myths About Women's Bo...
A new blood test is showing promising results for helping pregnant women know if they are at risk of a premature birth.
According to a study published on , researchers have developed a new test that can identify whether a mother and her baby have different blood types. Kristin Finning (International Blood Group Reference Laboratory, NHS) and colleagues maintain that the test is accurate, feasible, and could ...