How long can the third degree placenta last?

Many people are not very clear about what grade three placenta means. First of all, the placenta is a thin film that wraps the baby's body when it is born. This film absorbs nutrients in the uterus and supplements nutrients to the baby's body. Therefore, the nutritional value of this film is very high. It also absorbs the essence of the mother. Grade three placenta indicates that it is fully mature. At this time, the month has exceeded the expected date of delivery, and the placenta can no longer be used to supply nutrients.

What does placenta 3 degrees mean?

The third degree of placental maturity means that the placenta is already mature. If it exceeds the due date, a caesarean section is required in time. When the placenta is mature, it cannot provide nutrition to the fetus.

The placenta will gradually mature as the pregnancy progresses. When it matures to a certain extent, its function will decline, just like aging, and it will not be able to provide nutrition and oxygen to the fetus normally. The placenta maturity grade is a standard used to measure the maturity of the placenta, which is usually divided into 4 levels, as follows:

Placental maturity is divided into four levels: Placenta level 0: early and mid-pregnancy placenta, immature.

Placenta grade 1: An early sign of maturity, appearing around 30 weeks of pregnancy, indicating that the placenta is not yet mature, but in a few cases it persists until delivery. Using the L/S ratio as a control, about 60% of grade 1 placentas have a ratio of 2.0.

Placenta grade 2: questionable maturity, about 10% of amniotic fluid L/S ratio is <2.0, 55%-60% of full-term pregnancies are grade 2 placentas, and if it reaches grade 2 before planned delivery in high-risk pregnancies, the fetus has a great chance of survival.

Placenta grade 3: mature placenta, L/S ratios are all ≥2.0.

The maturity of each person's placenta is different: mid-pregnancy (12-28 weeks) - placenta grade 0; late pregnancy (30-32 weeks) - placenta grade 1; after 36 weeks - placenta grade 2 (relatively mature). If a grade 3 placenta is found before 37 weeks and combined with the value of the biparietal diameter and the estimated fetal weight of 2500 grams, placental precocity should be considered and the patient should be alert to the possibility of intrauterine growth retardation. At 38 weeks, the placenta enters stage 3, indicating that the placenta is mature.

In late pregnancy, the function of the placenta decreases as the fetus matures. The aging of the placenta means that the function of the placenta is significantly reduced, which may affect the development of the fetus. If the fetus is mature, early delivery is required.

The so-called placental aging refers to the decline and reduction of the function of the placenta, which results in fetal hypoxia, malnutrition, developmental delay and fetal distress, and even stillbirth, stillbirth, neonatal asphyxia, etc. The long-term consequence is fetal brain cell necrosis and poor development, and ultimately leads to mentally retarded children.