A strong light spot in the left ventricle of the fetus, if it is not very large and there is no abnormality in other parts of the body, usually does not require treatment and regular review is sufficient. However, if it is combined with other test abnormalities, prenatal diagnosis is needed. A strong light spot is a plaque formed by punctate calcification of the papillary muscles or tendon cords of the heart. If it exists singly and there is no abnormality in other parts of the body, the strong light spot will usually shrink or disappear with the increase of pregnancy months, so it does not need to be treated, and it is sufficient to follow the doctor’s instructions to have regular checkups. However, if there is a combination of other abnormalities in the macules, such as abnormalities in the Down’s syndrome and non-invasive DNA test, and thickening of the NT, then prenatal diagnosis is needed to determine whether the fetus has some chromosomal diseases.