Fetal left ventricular strong echogenic spot refers to the point-like strong echogenic spot in the left ventricle of the fetal heart found by the doctor during the ultrasound examination of pregnant women, which can be one or more, and is usually a trace of fetal heart tendon development, which is a soft indicator of ultrasound examination and is a relatively common test result that can determine whether intervention is needed according to the subsequent development. Usually, as the gestational weeks increase and the fetal heart develops gradually, the intensity of the echo usually diminishes or even disappears. Therefore, if there is only one indicator of strong echogenic spots in the left ventricle at the time of labor and delivery and there are no other abnormalities, it is usually normal. If the echogenicity does not diminish, or even increases or becomes larger, fetal heart ultrasound and amniocentesis can be performed to determine whether there are fetal heart malformations, structural abnormalities of other organs or chromosomal abnormalities, and a professional physician will determine whether it is appropriate to continue the pregnancy based on the test results. The fetal development is closely related to the environment of pregnant women. During pregnancy, we need to pay attention to quit smoking and drinking, stay away from second-hand smoke, use air purifiers to cope with the high air pollution index in the vicinity, avoid applying drugs that are contraindicated for pregnant women, and pay attention to a balanced and nutritious diet with moderate supplementation of folic acid to ensure healthy fetal development. Its presence is a soft indicator that the fetus has Down’s syndrome. If the risk of the fetus having Down’s syndrome has been ruled out by DNA non-invasive screening and amniocentesis, observation is sufficient, otherwise, the fetus needs to be examined for fetal chromosomes.