Placenta grade 3 at 37 weeks of pregnancy indicates that the placenta has matured and is suitable for delivery, but placental maturity is only one of the rough indicators for judging the growth of the fetus in the uterine cavity, and cannot be used to judge the time of delivery, and how long it will take for the delivery to take place needs to be judged in conjunction with other circumstances. Placenta 3 at 37 weeks of pregnancy is normal, because with the increase of pregnancy weeks, the placenta maturity gradually improve, but at the same time, it means that the function of the placenta began to gradually aging, due to the ability of the placenta to transport oxygen and nutrients decreased, pregnant women need to be vigilant about fetal growth and development retardation or lack of oxygen. At this time, pregnant women need to pay attention to do a good job of obstetric examination, check the health of the fetus on a regular basis, if there is a lack of oxygen, it is recommended that pregnant women moderate amount of oxygen, pay attention to the combination of work and rest, and if the situation is serious, it is necessary to consider terminating the pregnancy as soon as possible. Placental maturity and delivery time are not directly proportional to the state, so simply based on placental maturity, can not judge the delivery time, the specific delivery time is related to the condition of the fetus and the pregnant woman, as well as the expected date of delivery, need to be different from person to person, should be combined with the uterine contractions, vaginal redness, whether the fetal head is in the pelvis and other circumstances to determine the synthesis, which will be more accurate. In general, pregnant women will give birth at full term, and 37 weeks of pregnancy has already entered the full-term pregnancy, so there is always the possibility of labor, so pregnant women should pay attention to observe the physical condition, if the amniotic fluid rupture, regular contractions or vaginal bleeding, indicating that the fetus is about to give birth, you need to go to the hospital as soon as possible to wait for delivery.