4D ultrasound is an important test for pregnant women to screen for fetal malformations during pregnancy, and fasting is not required.
Generally in pregnancy 20 ~ 24 weeks of fetal four-dimensional ultrasound screening of the fetus for the presence of major malformations of an important examination, in addition to screening for the presence of fetal malformations, but also to monitor fetal growth and development, monitoring the amniotic fluid volume and placenta position, etc., the four-dimensional ultrasound without the need to hold urine or fasting, such as in the case of the position of the fetus does not cooperate with the food or activities can be repeated after the examination.
Four-dimensional ultrasound is an important test for screening fetal malformations during pregnancy, but it is not foolproof, for the presence of functional disorders, chromosomal abnormalities, etc., need to improve other tests or postnatal close observation, it is recommended that the pregnancy checkups.