The cost of 3D ultrasound is higher than the cost of ordinary ultrasound. Moreover, the cost varies according to the geographical location of each region and the level of each hospital. In the central region, the cost of mid-pregnancy fetal 3D examination is 280 RMB for provincial hospitals, 240 RMB for municipal hospitals and 200 RMB for county hospitals. The price of taking pictures is not included in these examinations. The price of film printing is roughly between 12 and 18 yuan. The prices of medical and health service system in our country are guided by the price authorities and health administrative departments in the region, and the prices of each hospital are recorded in the relevant departments. Each hospital can do 10% fluctuation according to its own situation. Clinically, three-dimensional ultrasound examination is widely applicable, not only for prenatal screening during the fetal period, but also in the case of abnormal occupancy of other organs and tissues, which can clearly show their morphological size and the adjacent relationship with the surrounding tissues. Therefore, the cost of 3D ultrasound is higher compared to other ultrasounds.