Having both anterior and posterior placenta is normal and doesn t affect the growth and development of the baby. However, mothers with posterior placenta might seem to have a little more advantage than those who have anterior placenta. This is because having the placenta on the back wall of the uterus means feeling the baby s movements and kicks early and stronger. Moreover, posterior placenta is considered to be the best for the baby as it allows the baby to grow and descend to the right position and align in the birth canal for a vaginal birth. With posterior placenta, as the baby grows it faces the mother s spine and the crown descends to the birth canal with time.