4D generally refers to 4D ultrasound during pregnancy, and QUAL HIGH on the checklist represents high quality. When pregnant women do 4D ultrasound during pregnancy, they may find QUALITY HIGH in the checklist, which mainly represents high quality, i.e., ultrasound doctors set up the instrument with a high quality level, and usually has no relationship with the fetus, maternal health or various indicators, etc., so there is no need to worry excessively. 4D ultrasound is one of the common and important test results during pregnancy, which can diagnose whether the fetus is malformed or not. 4D ultrasound is a non-invasive examination, so pregnant women do not need to worry too much and actively cooperate with the doctor. In order to fully observe the condition of the fetus, pregnant women should choose to have the examination when the fetus moves more frequently. If the fetus is not active during the examination, it can be improved by walking slowly, eating properly, etc., and the 4D ultrasound examination can be postponed if necessary. It is recommended that pregnant women attend medical checkups on time in order to monitor the development of the fetus. If the 4D ultrasound examination finds that the fetus is suspected to be malformed, further amniocentesis and other tests can be done to confirm the diagnosis.