Placenta previa lying in bed does not promote the growth of the placenta. Placenta previa is a condition in which the edge of the placenta is close to the edge of the cervix. This condition can lead to painless vaginal bleeding and even placental abruption during pregnancy. Bed rest in placenta previa does not promote the growth of the placenta, but bed rest can avoid the irritation of the uterine cavity which may lead to aggravated bleeding. Pregnant women should pay attention to regular checkups during pregnancy, and if placenta previa is present, they need to pay attention to whether there is any abnormal discomfort. If abdominal pain or vaginal bleeding occurs, it is necessary to go to the hospital as soon as possible, and if necessary, give appropriate treatment to protect the fetus and stop bleeding. Pregnant women should also pay attention to avoid strenuous exercise during pregnancy, and supplement more nutrition. Maintain a good emotional state, do not have too much psychological pressure, so as not to aggravate the condition.