"cultivation" ? In order to improve the embryo implantation rate, embryo biopsy, etc., sacculture will be carried out. When getting the blastocyst report, when facing the combination of numbers and letters, some expectant mothers may feel that they do not understand the specific meaning they represent.
So what does the doctor use to distinguish the blastocyst grade? Which embryo transplantation has a higher rate of implantation ? Let’s answer it for you today, and save it with one click!
know blastocyst
First understand the entire process of embryonic development. A normal embryonic development process requires the cleavage of the embryo, murula and blastocyst periods. The fertilized eggs at each period will show different cell numbers and morphology.
embryos during the blastocyst period, also known as blastocyst . is the terminal stage of early embryo culture in vitro, usually formed on days 5 to 6 after egg fertilization.
At this time, the cells begin to initially differentiate, forming a structure composed of the cell clusters in , the blastocyst cavity and the trophoblast layer , called blastocyst.
blastocyst grade report interpretation
1 blastocyst grade? Currently, the " Gardner's human blastocyst grading system " is widely used, and it is evaluated by morphology of blastocysts, that is, the "appearance" of blastocysts. When we get the level report, we often see "4AB, 3BC...", and the three characters have their own representative meanings.
1th number
1th number, which represents the degree of blastocyst development of http://www.sub.com/
1322blastocyst cavity accounts for more than half of the embryo volume 3complete blastocyst, completely filled with embryo 4html The expanded blastocyst has a cavity larger than the embryo, and the shell becomes thinner 511~2 blastocyst is incubated in the shell. Because the blastocyst is small, it is difficult to accurately distinguish the boundaries of the inner cell mass. Therefore, the evaluation of blastocyst 3 to 6 is generally started, and mass grading is also required for binding of inner cell mass and trophoblast cells.
2 letter
The second letter represents the mass grading of cell mass in , represented by the three letters A/B/C, A is better than B and B is better than C. The inner cell mass will develop into a fetus in the future.
A cells are large, tightly arranged B cells are small, loosely arranged 1Chtml ml1 cells have very few
3 letter
3rd letter
1 3rd letter represents the mass grading of trophoblast cell , also represented by the three letters A/B/C. The trophoblast cell will develop into placenta that provides nutrition to the baby in the future.
A cells are large, forming a dense layer B large number of cells, forming a dense layer CHighly large cells
For example, the embryo of 4AB means that the embryo is in the expansion blastocyst stage, with a large number of cells in the cell mass, and the trophoblastic cells are fewer and looser. It is an embryo with high quality. Therefore, by combining these numbers, you can know the morphological quality of the blastocyst. At the same level, the order of the quality of blastocysts from excellent to inferior should be: AA, BA, AB, BB, CA, AC, CB, BC, CC.
At this point, I would like to remind you: look at the blastocyst level rationally and objectively. The blastocyst level can only represent the current development status of the embryo. It is not that high-level embryos will definitely implant, and low-level embryos have little hope. The subsequent development of the embryo also depends on its own potential (such as embryonic chromosomes) and the maternal environment.
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