At 30 weeks of pregnancy, a placental maturity level of 0 is usually normal. The maturity of the placenta is related to the week of pregnancy and increases as the weeks increase. Placenta grade 0 to 1 at 30 weeks gestation is usually normal. If the placental maturity exceeds grade 1 and reaches grade 2 or even grade 3, then there is a tendency of maturation and aging, which mostly occurs after 37 weeks of full-term conception. 30 weeks of pregnancy belongs to the late stage of pregnancy, you need to pay attention to monitor the fetal heart fetal movement, if the fetal movement is abnormal, it may be caused by the aging of the placenta or hypoxia, you need to consult the doctor in time to carry out fetal heart rate monitoring, to see whether it is necessary to treat, such as oxygen, and so on. Pregnant women should pay attention to regular pregnancy checkups in the hospital to monitor the maturity of the placenta and other indicators, so that if any abnormalities are found, they can be detected as early as possible and intervene as early as possible.