Usually, placenta hypoplasia can return to normal at 28 weeks, i.e. 7 months, but some pregnant women may still have placenta hypoplasia after 28 weeks. Placenta hypoplasia is diagnosed if the distance between the placenta and the internal cervical os is less than 2 cm. Usually the placenta position can be fixed after 28 weeks of pregnancy. If the placenta is found to be hypoplastic before 28 weeks, it is recommended to pay attention to rest, avoid standing for a long time, reduce activities, and raise the buttocks moderately when resting. Generally, with the increase of gestational weeks and the elongation of the lower part of the uterus, the position of the placenta can return to normal after 28 weeks on its own. However, some pregnant women still cannot return to normal after 28 weeks. At this time, they should pay attention to avoid sexual life and serious physical activities to avoid irregular vaginal bleeding, which may lead to anemia if the bleeding volume is too large. In addition, pregnant women should pay attention to review ultrasound in late pregnancy to detect placental hypoplasia in time; meanwhile, if pregnant women have a small amount of bleeding, they can be treated with fetal preservation, and if the bleeding exceeds 200ml, they need to undergo caesarean section immediately.