Patient's question:
Today I received a notification from the hospital that a day 6 blastocyst-stage embryo was frozen. I consulted the doctor, and the doctor said it's still not very good, saying that day 5 blastocysts are the best and have higher success rates. Which is better, a day 5 blastocyst or a day 6 one?Doctor's answer:
To know that after the early embryo stage, by the 5th or 6th day, the embryo develops into hundreds of cells and becomes a blastocyst. Although blastocysts also have ratings, it's important to know that even the lowest-rated blastocysts have a higher implantation rate than fresh embryo transfer. In terms of blastocyst culture days, the 5th day is the best, followed by the 6th day, and then the 7th day.Additionally, the best blastocyst score should be a 5-day blastocyst with a 3AA rating. Of course, the final result still depends on the doctor's advice. Sometimes, by the 5th day, the blastocyst may not have developed sufficiently, and the doctor may recommend waiting another day. As long as the blastocyst culture is successful, the outcome of the later transfer is unlikely to be poor.