Four-dimensional color Doppler ultrasound is not only an important health examination for the fetus, but also the first meeting between mother and baby. Thinking color Doppler imaging is very realistic, and you can clearly see the dynamics of the fetus in the abdomen, just like you can see the fetus after birth, which adds a lot of interest to many mothers. ?

From the principle of ultrasound, it is a kind of sound wave, which belongs to mechanical vibration. There is no ionizing radiation and electromagnetic radiation, and there is no report of fetal malformation caused by ultrasound examination so far. Ultrasound examination is painless, noninvasive, economical and safe. It is widely used in the medical field, especially in obstetrics and gynecology.

Four-dimensional color ultrasound examination includes:

1 Determination of fetal gestational age

2 check the activity of the fetus.

3 Monitoring fetal growth and development

4 screening fetal malformation

Measurement of amniotic fluid, placenta and other fetal appendages

The advantage of four-dimensional color Doppler ultrasound is that it can screen whether there is cleft lip and palate, cleft lip, anencephaly, spina bifida and hydrocephalus. Hydronephrosis, polycystic kidney and megabladder, urethral obstruction, umbilical enterocele, visceral eversion and megacolon, too much or too little amniotic fluid in uterus, short limb deformity, conjoined deformity, etc.

Four-dimensional color Doppler ultrasound is the best time to do it at 22-28 weeks of pregnancy. If it is done too early, the fetal fat is still very small, and some parts are not fully developed, which is not conducive to the healthy development of the baby, but if it is too late, the baby has fallen to the pelvis, the range of activities is small, and it is difficult to see the whole body of the fetus.

You don't need to hold your urine or have an empty stomach to do four-dimensional color Doppler ultrasound. But don't eat too much, don't drink too much water, ensure your sleep, choose the baby's activity time, and try to avoid the baby's inactive time.

Four-dimensional color Doppler ultrasound examination has no influence on fetal development, because it is examined by ultrasound, which is obviously different from radiographic examination, and there is no radiation, so it can be examined by B-ultrasound during the whole pregnancy, and four-dimensional abnormality examination is also a kind of B-ultrasound examination, so it has no great influence. ?