I believe that many people get the IVF embryo report is ignorant, today I will teach you how to read the embryo report.
First of all, we must be clear that sperm and eggs combine to form a fertilized egg, and the embryo that develops for 1-3 days is what we usually call a fresh embryo, which is medically called a cleft embryo, and the development of 5-8 days is a blastocyst.
The mulberry embryo is an embryo in between, not with the number of days of development to be constant, but with the number of divided cells, when the number of fertilized eggs differentiation reaches 32, the embryo shape is similar to the mulberry, the general appearance of the mulberry embryo is about 72 hours after fertilization.
Fractionation of fresh embryos = number of cells + embryo grade
For example, 8cII is an 8-cell + II embryo
Embryo grade
Grade I embryos: uniform in size, in perfect shape, and within 10% of the fragment content
Grade II embryos: slightly uneven in size, not so intact shape, and between 10% and 20% fragmentation
Grade III embryos: Significantly uneven in size, irregular in shape, with a fragment content of between 21% and 50%.
Grade IV embryos: severely uneven cell size, severe particle phenomenon in cytoplasm, 50% debris >
From Level I to Level IV. Grade I embryos are best, and grade IV embryos are the worst unusable embryos.
Grades I and II are called quality embryos, and grades I to III are available embryos.
Blastocyst grading = degree of division + mass of inner cells + quality of the trophoblast
For example: 4AB, 4 is blastocyst splitting into stage 4; A large number of cells in A, tightly arranged; B cells are small in number and less uniform in size.
Degree of division
According to the size of the blastocyst cavity and whether it hatches, it is divided into 6 stages, and more than 2 stages are the best
1: Early blastocysts, the blastocyst cavity is less than half of the total volume of blastocysts
2: Blastocysts, the blastocyst cavity is larger than half of the total volume of the blastocysts
3: Complete blastocyst, the blastocyst cavity occupies the entire blastocyst
4: Expand the blastocyst, the blastocyst cavity is completely filled with embryos, the total volume becomes larger, the shell becomes thinner
5: Hatch the blastocysts, part of which are hatching from the shell
6: Hatch blastocysts, which hatch completely from the shell
Inner cell mass mass
A: The number of cells is large and tightly arranged
B: Small number of cells, loosely arranged
C: Very small number of cells
Nourishing layer quality
A: The number of cells is large, the size is uniform, and the cells on the bottom surface of the blastocyst are all clear in morphology, and most of the nuclei are visible
B: The number of cells is small, the size is not uniform, and some cells on the bottom surface of the blastocyst are clearly morphological, and some nuclei are visible
C: A very small number of large cells, the size is obviously uneven, there are obvious debris residues between the trophoblasts and the zona pellucida, and the cells on the bottom surface of the blastocyst are difficult to identify.