Patient's question:
My good friend is 25 years old this year. A couple of days ago, he told me that he has now developed obvious blastocyst embryos. He had never heard of this before and felt quite curious, wanting to understand the difference between a 5-day blastocyst and a 6-day blastocyst.Doctor's answer:
A blastocyst refers to the newly formed infant after pregnancy. The difference between a blastocyst and a zygote lies in stability. Due to its short formation time, the embryo is not very stable in terms of morphology and structure. The embryo contains fewer cells, meaning there are not many cells. The blastocyst is relatively stable, composed of a large number of cells, which can reach over 100, making it relatively stable. The embryo and blastocyst are two situations that only occur in vitro fertilization.