Placental Index Grade II at 34 weeks of pregnancy is a normal phenomenon, and pregnant women do not need to be overly nervous. Placenta grading is a method to indicate the maturity of the placenta and the fetus, which can be clinically categorized as grade 0~Ⅲ. Grade 0 placenta is mostly seen before the 28th week of pregnancy, the placenta is not mature, grade I placenta is mostly seen in the 29th to 36th week of pregnancy, marking the basic maturity of the placenta, grade II placenta is mostly seen in the 36th to 40th week of pregnancy, indicating that the placenta has matured, and grade III placenta can suggest that the placenta has been aged, and the placenta’s ability to transport oxygen and nutrients has been reduced. Therefore, the ultrasound examination at 34 weeks of pregnancy shows that the placenta index of the second level is a normal phenomenon, pregnant women do not need to worry too much, keep a good attitude, and go to the hospital for regular checkups. However, if the test result shows that the placenta index is grade 3, then you need to be more vigilant and actively cooperate with the doctor for examination.