Is fasting required for non-invasive DNA testing?

It is not necessary to fast before undergoing non-invasive DNA testing. Non-invasive prenatal DNA testing analyzes fetal chromosome conditions by collecting cell-free DNA fragments from the mother's peripheral blood, thereby screening for potential fetal chromosomal abnormalities. This testing process is not affected by food intake, as the quantity and characteristics of fetal DNA in maternal peripheral blood do not significantly change due to eating. Therefore, whether the non-invasive DNA test is performed on an empty stomach or after a meal, the results remain consistent and accurate. However, pregnant women should avoid extreme dietary behaviors before testing, such as overeating, prolonged fasting, or excessive water intake, to prevent unnecessary physical stress or interference with the accuracy of other prenatal examination indicators.

Before undergoing non-invasive DNA testing, pregnant women should maintain healthy dietary and lifestyle habits, without the need for special fasting. Additionally, testing should be conducted at reputable, licensed, and experienced medical institutions or testing centers, following the guidance of physicians or testing facilities to ensure proper physical and psychological preparation. If significant discomfort occurs, prompt medical attention at a正规 hospital is advised.