What are the differences between frozen embryo and blastocyst in IVF?

Patient's question:

No

Doctor's answer:

Generally speaking, the blastocyst is the final stage of embryo culture in vitro, typically forming between days 5-7 after fertilization of the egg. Under natural conditions, human embryos implant into the uterus in the form of a blastocyst. Blastocyst transfer can achieve a higher embryo implantation rate. Therefore, blastocyst culture and blastocyst transfer have always been an option of interest to both patients and healthcare providers.