How many levels of placenta can be delivered

Checking the placenta is also a key step during prenatal checkups, because the placenta provides an environment for the growth of the fetus, and the quality of the environment will directly affect the health of the fetus inside the mother's body and after birth. The placenta starts at level zero and there are four levels in total. When it reaches level three, it means the fetus is full-term. So among the levels of placental development, at which level is birth possible?

The maturity of the placenta required for childbirth is different for each person. Placenta: mid-pregnancy (12-28 weeks) - placenta grade 0; late pregnancy (30-32 weeks) - placenta grade Ⅰ; after 36 weeks - placenta grade Ⅱ (relatively mature). If a grade III 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 grade III, marking placental maturity.

The maturity of the placenta is divided into four levels: O, 1, 2 and 3. Level 1 indicates that the placenta is basically mature; Level 2 indicates that the placenta is mature; Level 3 indicates that the placenta is aged. Due to calcification and cellulose deposition, the placenta's ability to distribute oxygen and nutrients is reduced, and the fetus is in danger. Placental maturity level 1 is normal. Grade 1 indicates that the placenta is basically mature; Grade 2 late indicates that the placenta is mature; Grade 3 late indicates that the placenta is mature and tends to age.

The placenta generally reaches grade III maturity at full-term pregnancy, but in a few cases the placenta reaches grade III before 36 weeks of gestation, or the placenta only reaches grade I when the gestational age exceeds 36 weeks. Therefore, whether the fetus is mature cannot be judged solely by the placental grade, but a comprehensive analysis based on other clinical indicators and data is required. Whether the fetus can be delivered mainly depends on whether the environment in the uterus is conducive to continued growth and development.

Generally speaking, the placenta will slowly mature after 36 weeks of pregnancy, but the placenta can mature ahead of time, so judging the time of delivery by the maturity of the placenta will not produce accurate results. If you experience spotting, water breaking, and regular uterine contractions while waiting, these are signs of delivery and you need to be hospitalized. In addition, if your umbilicus is wrapped around the neck, it will not affect the delivery of the fetus.

What is the placenta?

The placenta, also known as the afterbirth, is a temporary organ that only exists when female placental mammals are pregnant or when every placental mammal is still a fetus. It is located on the surface of the inner side of the uterus. The placenta consists of two parts. One part is biologically and genetically connected to the embryo, and the other part is part of the mother. The lining of the placenta is the amniotic sac, which contains amniotic fluid. The placenta implants in the wall of the uterus and receives nutrients and oxygen from the mother's blood and removes waste products. This interface also acts as a barrier, blocking certain substances that could harm the embryo. However, there are many substances that the placenta cannot intercept, such as alcohol and some substances produced by smoking. The placenta after childbirth is also a kind of traditional Chinese medicine, called human placenta and placenta.

The function of the placenta is complex and is not simply filtration. The site for substance exchange in the placenta is mainly at the vascular syncytial membrane (VSM). The vascular syncytial membrane is a thin film composed of five layers: syncytiotrophoblast cells, syncytiotrophoblast basement membrane, villous stroma, capillary basement membrane and capillary endothelial cells.