Non-invasive generally refers to non-invasive DNA, and pregnant women who have non-invasive DNA tests can have breakfast. Non-invasive DNA test can screen the fetus for chromosomal disorders, and it is recommended that pregnant women with preeclampsia and fever can have non-invasive DNA test. Non-invasive DNA test for pregnant women generally means that after 12 weeks of pregnancy, venous blood is drawn to determine whether there is any chromosomal abnormality in the fetus through gene sequencing and comparison. Since eating will not have an effect on the results of the non-invasive DNA test, pregnant women can have breakfast before the non-invasive DNA test. Non-invasive DNA test is mainly used to screen whether the fetus has three major chromosomal disorders such as Down’s Syndrome, Patau Syndrome and Edward’s Syndrome. Noninvasive DNA test can be performed if the pregnant woman has preeclampsia, fever, bleeding tendency or if the pregnant woman has Rh-negative blood.