Hello, the general pregnancy is between 18-26 weeks. You can go to the hospital for four-dimensional color Doppler ultrasound examination to rule out the possibility of fetal facial malformation. The cost of four-dimensional color Doppler ultrasound examination is about 300 yuan, which is related to the level and area of the hospital you choose. Need to go to the local hospital to consult the price. Generally, hospitals above the county level can do this kind of inspection. It is suggested to go to the hospital regularly during pregnancy to check the development of the fetus and the health status of pregnant women to see if it is normal, to maintain a good mood at ordinary times, not to be overly nervous, to have a diversified diet, to mix meat and vegetables, and to exercise properly to enhance physical fitness.