Low placenta refers to low lying placenta, meaning that the placenta is attached to the lower segment of the uterus with its edge less than 2 centimeters from the endocervical opening, which is a type of placenta praevia. If a woman’s ultrasound examination after 28 weeks of pregnancy reveals that the placenta is positioned lower than the prenatal area and is attached to the lower edge of the lower uterine segment, reaching or covering the endocervical opening, this condition is called placenta praevia, and it is the most common cause of vaginal bleeding in women in late pregnancy, and one of the serious complications of pregnancy. According to the relationship between the lower edge of the placenta and the opening of the cervix, placenta praevia can be divided into four categories: complete placenta praevia, partial placenta praevia, borderline placenta praevia, and low placenta. Comparatively speaking, placenta praevia is less serious, and if all aspects are normal, it is possible to have a trial of labor vaginally, which requires a thorough evaluation by an obstetrician.