Transferring day 5 blastocysts is relatively good to reduce the chance of ectopic pregnancy, increase the chance of successful implantation and make the blastocysts of better quality.
In vitro fertilization (IVF) is a commonly used assisted reproduction technique. Nowadays, embryos are usually cultured in vitro to the blastocyst stage and then transferred, which can increase the chance of success.
The blastocysts on the 5th day of transfer are relatively better, mainly in the following aspects:
1. During the process of blastocyst cultivation, generally on the 5th day, there will be an additional eugenic process, so that chromosomal abnormalities and poor quality embryos will be eliminated naturally, and high-quality blastocysts can be obtained.
2. On the 5th day of blastocyst culture, the blastocysts are large in size and it is difficult for them to move to the fallopian tube, and the chance of ectopic pregnancy is relatively lower.