When it comes to the two specialized terms ‘four-dimensional’ and ‘large fetal anomaly screening’, they may be very unfamiliar to many people, but they are indeed very familiar to pregnant mothers; some people may understand these specialized terms, but do not understand what they actually mean, and do not understand the relationship between them. Below, let’s discuss the differences between four-dimensional and large fetal anomaly screening.

Large fetal anomaly screening is a test during pregnancy, which can be performed using two-dimensional ultrasound, three-dimensional ultrasound, or four-dimensional ultrasound.

The basic large fetal anomaly screening B-ultrasound used generally belongs to two-dimensional ultrasound, mainly used to see whether there are malformations in the baby’s each plane, such as neural tube defects, spine, and four-chamber heart; three-dimensional ultrasound refers to the three-dimensional generation of several two-dimensional planes, four-dimensional is dynamic, that is, video, three-dimensional and four-dimensional take a long time, and the baby is exposed to ultrasound for a long time, but the fetal anomaly screening effect is the same.

What is large fetal anomaly screening?

Pregnant mothers all know that they need to have regular prenatal examinations. In fact, prenatal examination is a process of fetal anomaly screening. During the pregnancy to the middle stage, a ‘large fetal anomaly screening’ examination should be conducted to clearly understand the growth and development status of the baby in the uterine cavity.

Generally speaking, fetal anomaly screening during pregnancy is divided into five stages, among which the third stage is the best time for fetal anomaly screening, that is, between 20-24 weeks. At this time, B-ultrasound examination is conducted to understand whether the growth and development of the baby in the uterus is in line with the corresponding gestational age, and finally to observe and analyze whether the growth and development of the fetus has serious malformations.

What is four-dimensional color Doppler ultrasound?

Compared with other ultrasound diagnostic processes, four-dimensional color Doppler ultrasound can observe the dynamic movement of internal organs in real time.

Four-dimensional color Doppler ultrasound can observe the growth and development of the fetus in the uterine cavity comprehensively and multi-dimensionally, and can provide accurate scientific evidence for the early diagnosis of fetal congenital epidermal malformation and congenital heart disease.

The best time to do a four-dimensional color Doppler ultrasound is between 22-28 weeks of pregnancy, as the body and all key internal organs of the fetus have already fully developed at this time, and the amniotic fluid is suitable for fetal anomaly screening.

Four-dimensional color Doppler ultrasound is actually a type of fetal anomaly screening, and it is more comprehensive and all-encompassing than the content of fetal anomaly screening!

It is based on ultrasound, to see whether the growth and development of the baby in the uterus is in line with the gestational age; whether the fetus is healthy; whether the growth and development of the limbs, brain, and internal organs is deformed; and the examination of the amniotic fluid and umbilical cord condition of the pregnant woman.

Some hospital outpatients cannot perform four-dimensional color Doppler ultrasound, and they perform fetal anomaly screening based on three-dimensional or two-dimensional color Doppler ultrasound. Therefore, pregnant mothers may feel that the two are different in the past. Due to the different equipment, the actual effect is slightly worse, and the display information of the distal and facial parts is not very clear.