What is the maturity level of the placenta before giving birth? As the gestational age increases, the placenta will also undergo changes from new to old, which is called placental maturity. The maturity of the placenta is divided into four levels: Level 0, Level I, Level II and Level III. Grade I indicates that the placenta is basically mature, late grade II indicates that the placenta has matured, and late grade III indicates that the placenta has aged. Due to calcification and fibrin…