According to the four-dimensional time, the baby's face has always been invisible.

Patient's question:

No

Doctor's answer:

Generally, the best time to have a 4D ultrasound during pregnancy is between weeks 20 and 26. During this period, a 4D ultrasound can mainly observe that the baby's facial expressions are quite rich, and also that all the organs have developed. At the same time, it is suitable for fetal abnormality screening.