24 weeks of pregnancy placenta low will migrate upward with the increase of the uterus, slowly elevate, 24 weeks of pregnancy is the middle of pregnancy, the placenta position occupies a larger area of the uterus about 3/4, prone to placenta low, with the increase of the uterus, the proportion of the placenta area occupying the uterus decreases, generally will grow up, 28 weeks of pregnancy placenta lower edge from the inner cervical opening <2cm is called placenta praevia, if to be diagnosed it is best to rest in bed, avoid If the diagnosis is confirmed, it is best to rest in bed, avoid exertion, not to have sex, avoid strenuous activities, and regular review. If there is no vaginal bleeding, abdominal pain and other symptoms, you can observe the situation and it is recommended to check the baby's development by ultrasound regularly. If you have vaginal bleeding or painless vaginal bleeding, go to the hospital in time. Pay more attention to nutrition, eat more vegetables, and keep your bowels open to avoid constipation.