The presence of placenta grade II at 33 weeks of pregnancy is a normal condition that needs to be judged in the context of the specific conditions of the fetus and the pregnant woman. Generally speaking, before 36 weeks of pregnancy, the placenta is graded as Grade I. If the placenta enters Grade II at 33 weeks early, it may indicate that the placenta is mature, at this time, if the fetal size, fetal heart rate, fetal movement and other indicators are within the normal range, it means that the fetus is developing well and there is no need to worry too much. Pregnant women need to pay attention to rest, strengthen nutrition, regular maternity checkups and keep abreast of the fetal condition. If the placenta is in the second stage at 33 weeks of pregnancy, and at the same time there is a decrease in fetal movement, fetal heartbeat and abnormal amniotic fluid, it may indicate premature placenta, reduced blood supply and oxygen supply in the placenta, impaired nutrient transfer, and the fetus may have developmental delay or stop development. The pregnant woman needs further examination to determine the condition of the placenta, and also needs to be hospitalized in advance, receive oxygen regularly, monitor the fetus closely, and end the pregnancy early if necessary. Usually, the grading of the placenta is a judgment based on the different manifestations of the placenta under ultrasound, which may differ from the true function of the placenta. Therefore, when determining placental maturity from ultrasound, it is necessary to combine other parameters and clinical data to obtain an accurate result, and not to make a generalization.