Sometimes the placenta is too low in the uterus and it may cause problems for the uterus to grow and stretch. This condition is called placenta praevia and it is easily diagnosed by the ultrasound scan. Grade 2 placenta praevia is when the placenta reaches the cervix, but does not cover it. Your wife should be rested during her pregnancy. But if there is bleeding during pregnancy the doctor would advice complete bed rest so that the baby can grow to a size and age that will give the baby the best chance of survival.