Patient's question:
I took seven tries to get one, and it was transferred in. There are no embryos left now. The check results show 4bb, please ask what the quality of a 4bb blastocyst is like?Doctor's answer:
In the 4BB blastocyst, the "4" represents different expansion stages of the blastocyst, here referring to a blastocyst that has already entered the expansion stage. Then, the "B" and "B" mainly indicate the quality grading of the inner cell mass and trophectoderm cells. A 4BB blastocyst means it is in the expansion stage, with a small number of inner cell mass cells arranged loosely, and the trophectoderm cell layer is composed of a few cells with a loose structure. Overall, it is considered a high-quality blastocyst.