What is the main purpose of the four-dimensional ultrasound scan for pregnant women?

4D ultrasound can provide real-time three-dimensional images, allowing doctors to more intuitively observe the development of the fetus. Main purposes of 4D ultrasound examination: 1. Fetal anatomical assessment: Checking whether each organ of the fetus is developing normally, including the brain, heart, spine, lungs, kidneys, abdominal organs, limb bones, and facial features. 2. Screening for congenital abnormalities: Identifying some common birth defects, such as congenital heart disease, open neural tube defects, cleft lip or palate, limb abnormalities, etc. 3. Fetal movement and activity: Observing fetal activities such as swallowing, yawning, waving hands, kicking legs, etc., to assess its vitality and growth. 4. Amniotic fluid volume and placental position: Checking whether the volume of amniotic fluid is normal and whether the placenta is in the appropriate position to avoid affecting the fetus. 5. Estimating fetal weight and due date: By measuring the size of the fetus, the due date and birth weight can be roughly estimated. However, although 4D ultrasound provides a great deal of information, it cannot replace other prenatal screening and diagnostic tests, such as Down syndrome screening or amniocentesis.