What is the maturity level of the placenta before giving birth?

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. There are four levels of placenta maturity: 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 cellulose deposition, the placenta\’s ability to transport oxygen and nutrients is reduced, and the fetus is at risk at any time. The lower the degree of maturity, the better the function of the placenta and the more nutrients it can provide to the baby. Level 0 is immature and is more common in the second trimester; Level I is beginning to mature and is more common between 29 and 36 weeks of pregnancy; Level II is The mature stage is more common after 36 weeks of pregnancy. On the contrary, it goes to the later stage. When the placenta has aged to level III, it means the placenta has matured and is tending to age. It is more common after 38 weeks of pregnancy. Even if it becomes calcified, it will provide less and less energy and oxygen to the baby, causing intrauterine distress and other conditions. If placental grade III is found before 37 weeks combined with the value of biparietal diameter and an estimated fetal weight of 2500 grams, precocious placental maturation should be considered and the possibility of intrauterine growth retardation should be alerted. The placenta enters grade III at 38 weeks, indicating that the placenta is mature. Be alert to the possibility of intrauterine growth retardation.