Is 4D ultrasound mandatory? I'm going to make an appointment to go to Yuhang Maternity Hospital to do a .

Four-dimensional B ultrasound has been more popular request to do Oh, when the baby development to 5-6 months or so, can be booked in advance to do, this is strongly recommended to do Oh. Four-dimensional ultrasound is mainly to observe the baby's limbs, head and face organs such as ears, nose and other development is sound. It can to a certain extent rule out the possibility of malformation. But because the baby's position in the abdomen is different, can not be 100% excluded Oh, for your reference