Two-dimensional ultrasound refers to two-dimensional ultrasound, which is a general ultrasound with cut surface imaging, capable of checking whether there are malformations in the five senses, limbs, organs and other parts of the fetus, as well as checking the position of the fetus, and so on. Two-dimensional ultrasound is suitable for the middle and late stages of pregnancy, when the fetal tissues and organs have basically grown completely, and the ultrasound can intuitively check whether the morphology of fetal organs is normal or not, and whether there are deformities in the limbs, organs and other parts of the body. In addition, it can also clarify whether the fetal position is abnormal. If abnormalities are detected during the examination, it is recommended to consult a doctor in time, and under the doctor’s guidance, complete the relevant examinations to clarify the cause of the disease and take appropriate treatment measures.