You can eat if you have a mini-detector test. Mini-detectorial examination refers to ultrasound examination, which is usually performed at 28-32 weeks of pregnancy, and belongs to the supplement of the major detectorial examination, which is used to screen the fetus for abnormal development or congenital defects, etc., such as congenital heart disease, anencephaly, brain bulge or spina bifida, etc., and to exclude abnormal development of the fetus. Before the mini-exam, pregnant women can eat normally and do not need to keep an empty stomach in advance for the examination. Before the microdiagnostic examination, pregnant mothers should be more active, such as walking back and forth, so that the fetus moves, can maintain a better position, so that the doctor can see more clearly. If during the process of microdiagnostic examination, due to the fetal position, resulting in the doctor can not see the fetus, it is recommended that pregnant mothers eat some appropriate chocolate, etc., so that the baby move, but also help the smooth conduct of the microdiagnostic examination.