Usually fetuses with left choroid plexus cysts go for non-invasive testing to rule out chromosomal abnormalities in time. Non-invasive refers to non-invasive DNA prenatal testing, and usually when the fetus is checked for the presence of a left choroid plexus cyst it needs to go for non-invasive DNA prenatal testing, and possibly an amniocentesis test as well. Non-invasive DNA prenatal testing is mainly designed to detect the presence of three major chromosomal disorders in the fetus, i.e., Down’s syndrome, Partaud’s syndrome, and Edward’s syndrome. Therefore, left choroid plexus cysts need to be promptly ruled out as a problem caused by chromosomal abnormalities to prevent developmental defects in the fetus. Secondly, left choroid plexus cyst may also be a physiological phenomenon, most commonly seen in fetuses between 14 and 24 weeks, and usually disappears on its own around 26 weeks. To sum up, when checking out the left choroid plexus cyst of the fetus, pregnant women need to further improve other tests to clarify the specific causes.