One of the reasons why the 4D ultrasound is not successful may be that the child is not willing to move. Pregnant women can climb more stairs, do more activities, or eat more chocolate-based sweets to stimulate the child to move and then have the 4D ultrasound. It is also advisable to have the 4D ultrasound in the morning because the child is more active during the morning hours. If there is an abnormality that requires further testing, possibly even an amniocentesis, a prenatal diagnostic specialist will be able to confirm the diagnosis. If there is indeed a serious malformation that affects the growth of the fetus, it should be promptly treated by induction of labor. If the fetus is deformed, it can be surgically corrected after birth, but the next decision needs to be made on an individual basis. Therefore, when the 4D ultrasound does not pass the test, do not worry too much, you need to find a regular prenatal diagnostic doctor or specialist to make the right decision.