A baby plays a vital role in the formation of a happy family. 4D ultrasound is one of the most advanced color ultrasound devices, which can observe the 4D dynamic picture of the baby in the womb in real time through the high-definition display, and also has a strong ability to perform detoxification, so it is favored by the parents-to-be. The price of 4D ultrasound is also a hot topic of concern for many people. The price of 4D ultrasound varies from region to region and from hospital to hospital. Although the price of 4D ultrasound is slightly more expensive than traditional B-ultrasound, the significance of the examination is greater and the few hundred yuan is worthwhile for each family than the health of the child. The price of 4D ultrasound varies depending on the hospital and the region. It is known that the price of a 4D ultrasound is about a few hundred dollars, and the cost is different for a singleton and a twin. Since it can detect fetal diseases and defects and allow the mother-to-be to wait for delivery with peace of mind, it is relatively cost effective. The application of 4D technology provides richer image information for clinical ultrasound diagnosis, reduces the leakage of lesions and improves the quality of diagnosis and treatment. As a high-tech technology, not all hospitals are able to master this technology, so it is recommended that mothers-to-be must choose a regular hospital when choosing a hospital, the operation technology will be more secure, and there will be no indiscriminate charges, because the regular hospital charges are strictly in accordance with the unified planning of the Health Bureau, open and transparent, to eliminate the phenomenon of indiscriminate charges. The first time you can choose to do 4D ultrasound, the fetal baby is still small, through the instrument can be photographed baby whole body, it is worth reminding that 1-2 months is not recommended to do 4D ultrasound, this pregnancy do 4D controversial. 2. To check the external defects of the fetal baby: At this time, you can choose to do 4D ultrasound in the middle or late pregnancy, at this time, the baby’s body has already developed to a certain extent, and it is impossible to take pictures of the baby’s whole body, but you can observe the shape of a certain part of the baby.