High D-dimer in pregnant women does not have much to do with placental maturity, nor does it accelerate placental maturity. High D-dimer in pregnant women is because pregnant women belong to the hypercoagulable state, with the increase of gestational weeks, D-dimer will also increase significantly, which is a normal physiological phenomenon. However, if D dimer is too high, more than the normal value, consider that the pregnant woman may have hypertensive disorders of pregnancy, thromboembolic disease, which has an impact on the pregnant woman, and need to consult a doctor in time for treatment, but this has nothing to do with placenta maturity. Placental maturity is related to the development of the fetus, with the growth of the fetus, the placenta will gradually grow and mature, so that it can better provide nutrients for the fetus, and wait until almost delivery, usually the placenta maturity will reach level 2-3. Pregnant women should do a good job of pregnancy checkups, if there is any abnormality need to consult a doctor in time, and follow the doctor’s advice for treatment.