How are placenta grades divided? How many grades are there for embryos?

When a woman reaches a certain stage of pregnancy, the placenta will be graded. Under normal circumstances, the placenta is divided into three levels, and different levels represent different functions. If the placenta appears in three levels, it means that the placenta has tended to age, which will generally affect the function of the placenta and is not conducive to the fetus's absorption of nutrients. How are the placenta grades generally divided?

Placenta grading begins in the late pregnancy (28 weeks of gestation). The placenta grade will appear on the B-ultrasound report. At this time, the placenta grade is mostly 0-I. By around 36 weeks, the placenta grade may be I-II. By around 40 weeks, the placenta grade may be II-III. Generally speaking, a placenta above grade II indicates that the fetus is mature. If the placenta reaches grade III, it means that the placenta is mature and tends to age, which will affect the function of the placenta and is not conducive to the fetus's absorption of nutrients.

Grannum placenta grading system divides placental maturity into four grades:

Grade 0 placenta: The villous plate is a bright straight line, the substance is uniform and fine granular, and the base cannot be seen. Most cases occur before 28 weeks of pregnancy.

Grade 1 placenta: The chorionic plate is a slightly undulating bright line, the placental parenchyma is slightly coarse, the echo is slightly strong, and the basal layer has not yet appeared. It usually appears at 29-30 weeks of gestation.

Grade 2 placenta: The chorionic villus plate is notched and extends to the placental parenchyma but does not reach the basal layer. The granules of the placental parenchyma become coarser and stronger short columnar echoes appear. Irregular and stronger strip echoes may appear in the basal layer, parallel to the muscle wall. The gestational age is usually between 36 and 40 weeks.

Grade 3 placenta: The villous notch has reached the basal layer, and multiple strong echo rings appear in the placental substance. Echo-free pools may appear inside, and sometimes calcification foci with enhanced reflection can be seen.

Placenta grade 0

Usually, ultrasound examination results divide the placental maturity into 4 levels: Level 0 is immature, which is more common in the second trimester; Level I is beginning to mature, which is more common between 29-36 weeks of pregnancy; Level II is mature, which is more common after 36 weeks of pregnancy; Level III is mature and aging, which is more common after 38 weeks of pregnancy.

Grade 0 placenta mainly refers to the villous plate presenting a bright straight line; the substance is uniform and fine granular, the echo is relatively attenuated, and the basal layer cannot be seen. A grade 0 placenta occurs before 28 weeks of gestation and indicates that the placenta is immature.

Placenta grading grade 1

Placenta grade 1 is naturally slightly more mature than placenta grade 0. Grade 1 is the best grade in the placenta grading. It can provide good nutrition to the baby. Grade 2 placenta begins to age, but it will not affect fetal absorption. Grade 3 placenta means that the baby is about to be delivered.

Generally, the placenta reaches level 1 maturity between 30 and 32 weeks of pregnancy.

In the early stages of pregnancy, the biggest concern clinically is that the function of the placenta will age as the time passes. In other words, the longer the time passes, the greater the possibility of placental aging. If the placenta ages, it will not provide enough nutrients and oxygen to the fetus, which may cause fetal hypoxia. If the fetus is deprived of oxygen, it is likely to die in the womb or develop brain damage after birth.

Therefore, when the placenta is at level 1, it must be treated with caution and care to provide the fetus with sufficient oxygen and nutrients to ensure the healthy development of the fetus.

Placenta grade 2

Generally speaking, after 36 weeks of pregnancy, the placenta reaches level 2 maturity, indicating that the placenta has begun to mature. However, the placenta can mature prematurely. 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, precocious placenta should be considered and the possibility of intrauterine growth retardation of the fetus should be alerted.

Here we need to remind all expectant parents that the more mature the placenta is, the better it is. It is good to have a corresponding degree of placental maturity according to the pregnant stage of the woman, because the placenta is the key to supplying nutrition to the fetus. A prematurely mature placenta means that the placenta ages quickly, which can easily lead to insufficient oxygen supply to the fetus and even cause delayed growth and development of the fetus. By the end of pregnancy, the placenta is basically mature.

Placenta grading 3

Placenta grade 0-1 indicates that the placenta functions well, grade 1-2 indicates that the placenta functions normally but slightly decreased, and grade 3 indicates that the placenta functions decreased, affecting normal delivery. At 38 weeks, the placenta enters grade 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.

Placental aging is actually not a very scientific issue, because the placenta, like the baby, has a process of occurrence, growth, development, and maturity. Many people think that it is aged when it reaches level 3. In fact, after 35 weeks, level 3 only guarantees its maturity, not aging. The function of the placenta is based on many examinations, such as the amount of amniotic fluid, the fetal heart rate monitoring, and some biochemical tests, which can also tell whether the placenta functions well.