Is it normal to have a grade 1 placenta at 27 weeks?

During pregnancy, female friends should pay attention to the condition of the embryo at different stages of pregnancy. This will have a great impact on the development of the fetus, and can also effectively alleviate the impact on the fetus and even the health of the pregnant woman. So is it normal for the placenta to be at level 1 maturity at 27 weeks of pregnancy?

Is it normal for the placenta to be mature at 27 weeks?

At 27 weeks of pregnancy, placental maturity level 1 is normal, level 2 is perfect, which means before delivery, and level 3 is over-mature. There are four levels of embryo maturity: O, 1, 2, and 3. Grade 1 indicates that the embryo is basically complete. Grade 2 late indicates placental maturity. Level 3 late indicates that the embryo has declined. Due to the thickening and cellulose accumulation, the embryo's ability to transport oxygen and nutrients is reduced, and the fetus is at risk at any time. Everyone's situation is different. Embryo: mid-to-late pregnancy (12-28 weeks) - placenta grade 0. Late pregnancy (30-32 weeks)—Embryo I. After 36 weeks - embryo grade II (more complete). If the embryo is found to be grade III before 37 weeks and combined with the value of the fetal biparietal diameter and the estimated baby weight of 2500 grams, the embryo maturity should be considered and the possibility of fetal intrauterine growth and development retardation should be alerted. At 38 weeks, the embryo reaches grade III, indicating that the placenta is mature.

The most common way to judge the maturity of the placenta is through ultrasound, which mainly judges the calcification points on the embryo. If the calcifications are diffuse, the placental maturity can be diagnosed as grade 2. If the calcification points are connected, the placenta maturity can be distinguished as level 3. In addition to the ultrasound method mentioned above, it is also necessary to observe the amount of amniotic fluid of the pregnant woman, use B-ultrasound to see whether the umbilical artery blood flow rate is normal, monitor the fetal heart rate, test the estriol and creatinine ratio in the urine, check the cells falling off the vaginal wall, etc., which can reflect the condition of the embryo and require comprehensive consideration before diagnosis.

Placental maturity classification standards

Grade 0 embryo: The fluffy plate is a bright straight line, the substance is uniform and granular, and the muscle base is not visible. It usually appears before 28 weeks of pregnancy.

Grade 1 embryo: The fluffy plate is a slightly undulating bright line, the embryo's intrinsic granular material is slightly coarse, the echo is slightly stronger, 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 have a strong short columnar echo. The dermis may have irregular and strong strip echoes, which are parallel to the muscle wall. The gestational age is usually between 36 and 40 weeks.

Grade 3 embryo: The villous notch has reached the dermis, and there are several strong echogenic rings in the embryonic body, 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 largest amniotic fluid dark area (AFD) is used to indicate the amniotic fluid flow. If it exceeds 7CM, it can be considered as polyhydramnios. If the amniotic fluid index method (AFI) exceeds 18CM, it is polyhydramnios. (The precise measurement of the amniotic fluid index is centered on the navel, dividing the abdomen into four quadrants, measuring the largest amniotic fluid dark area in each quadrant separately, and summing the four data.) The B-ultrasound diagnosis of oligohydramnios uses the largest amniotic fluid depth of no more than 3CM as the diagnostic standard. The amniotic fluid index method is more accurate than AFD. AFI no more than 8CM is used as the critical point for diagnosing oligohydramnios, and AFI no more than 5CM is the absolute value for diagnosing oligohydramnios.