Three-dimensional refers to three-dimensional color ultrasound for the examination of fetal malformation, generally does not need to hold urine on an empty stomach.
Three-dimensional ultrasound is a three-dimensional dynamic color Doppler ultrasound, can observe the growth and development of the fetus, various indicators of abnormalities, etc.; can also see the placenta, amniotic fluid and other indicators. These indicators are generally not affected by whether the pregnant woman holds urine, so generally do not need to deliberately hold urine.
Generally, the three-dimensional ultrasound is carried out at 20-26 weeks, when the normal development of the fetus is of the right size and the amount of amniotic fluid is also appropriate, and at this stage, it is possible to observe most of the indicators of the fetus.
It is also not necessary to do 3D ultrasound on an empty stomach, the position of the fetus is always changing, in order to avoid a checkup is not in place, you can prepare some snacks for energy.