The placenta is the most important part of the fetal appendages during pregnancy. The placenta is responsible for completing the exchange of nutrient gases and other materials between the mother and the fetus. The position of the placenta depends on the location of the fertilized egg at the beginning of pregnancy. After entering the uterine cavity, the fertilized egg undergoes random implantation depending on the morphology of the uterine cavity. After implantation, the fertilized egg gradually develops into the placenta. Depending on the location of the fertilized egg, the placenta can be classified into: posterior uterine placenta, anterior uterine placenta, placenta at the base of the uterus, and placenta in special areas. The posterior placenta is the placenta that develops in the early stages of pregnancy when the fertilized egg lays on the posterior wall of the uterus. This posterior placenta is a normal type of placenta and is not a cause for excessive concern. It is important to note that the patient is advised to review the fetal ultrasound periodically during pregnancy to monitor changes in the placenta position. If the placenta position gradually decreases as the embryo develops, this should be taken into account. In some cases, vaginal bleeding may occur because of the low placental position. In summary, the posterior placenta is simply a result of the fertilized egg lodging in the posterior wall, which is a normal position and does not require special treatment.