Placenta low pad pillow is not harmful, but can not improve the state of low placenta, and will not jeopardize the development of the fetus in the womb. Normal pregnancy placenta position attached to the body of the uterus in the anterior, posterior, lateral wall, the placenta attached to the lower part of the uterus, the lower edge of the placenta up to the cervical os or cover the cervical os, the position of the placenta than the fetal prelude to lower for the placenta low, the phenomenon of painless vaginal bleeding during pregnancy, increase the chances of fetal miscarriage or preterm delivery. Pregnant women with low placenta can also pad pillows, and does not cause harm. Pregnant women with low placenta usually exercise strenuously, have sex, and do squatting a lot, which are the only things that may be harmful and increase the chances of vaginal bleeding. In addition, low placenta before 28 weeks of pregnancy, with the increase of pregnancy weeks may grow to a normal position, if there is no change after 28 weeks of pregnancy can be diagnosed as placenta praevia.