Placenta grade

At the beginning of the late pregnancy (28 weeks of pregnancy), the placenta grade will appear on the B-ultrasound examination report. At this time, the placenta grade is mostly 0-I. By around 36 weeks, the placenta grade may be I-II, and by around 40 weeks, the placenta grade may be II-III. Generally speaking, embryos above grade II indicate that the fetus is mature. If the embryo reaches grade III, it means that the embryo is already perfect and tends to be aging, which will affect the function of the placenta and is not conducive to the fetus's digestion and absorption of nutrients.

Placenta grading classification standards

Grannum placenta grading system divides placental maturity into four grades:

Grade 0 embryo: The plush board is a bright straight line, and the substance is uniform and fine particles, and the base material is not visible. Most cases occur before 28 weeks of pregnancy.

Grade 1 embryo: The fluffy plate is a slightly wavy bright line, the embryo's intrinsic granular material is slightly coarse, the echo is slightly strong, the dermis has not yet appeared, and the gestational week is usually 29-36 weeks.

Grade 2 embryo: The villous plate is notched and extends to the embryonic epithelium but does not reach the dermis. The embryonic epithelium granules become wider and show strong short columnar echoes. Irregular and strong strip echoes may appear in the dermis, which are parallel to the muscle wall. The pregnancy weeks are usually between 36 and 40 weeks.

Grade 3 embryo: The villous notch has reached the dermis, and several strong echogenic rings appear in the embryonic core, with anechoic pools inside, and sometimes calcifications with increased reflectivity can be seen.

Amniotic fluid index method:

During B-ultrasound examination, the vertical depth of a single larger dark area of ​​amniotic fluid (AFD) is used to indicate the amniotic fluid flow. If it exceeds 7CM, it can be considered as polyhydramnios. If the amniotic fluid index (AFI) exceeds 18CM, it is considered as polyhydramnios. (The accurate measurement of the amniotic fluid index is based on the navel as the center, dividing the abdomen into four quadrants, measuring the largest amniotic fluid dark area at each position, and summing up the four data.) The ultrasound diagnosis of oligohydramnios uses the maximum amniotic fluid depth of no more than 3CM as the diagnostic standard. The amniotic fluid index method is more accurate than AFD. An AFI of no more than 8CM is used as the critical point for diagnosing oligohydramnios, and an AFI of no more than 5CM is the square root of the diagnosis for diagnosing oligohydramnios.

Placenta grading Placental maturity

There are four levels of embryo quality indicators: level 0, level 1, level 2 and level 3. Level 1 indicates that the embryo is almost complete; Level 2 indicates that the embryo is already complete; Level 3 indicates that the embryo has declined. Due to thickening and cellulose consolidation, the embryo's ability to transport oxygen and nutrients is reduced, and the fetus is at risk at any time.