Because blastocysts have a higher implantation potential than less advanced embryos, fewer are transferred. Oftentimes, only one good quality blastocyst is recommended for transfer. Remaining blastocysts are frozen for later use.

Which embryo is best for transfer?

According to a study in the Indian Journal of Clinical Practice, blastocyst embryo transfer has a higher success rate than the standard embryo transfer on day 3. However, another recent study suggests that it may pose risks later in pregnancy and should not always be recommended.

How do I choose a good blastocyst?

The cells should appear scalloped and cohesive. The inner cell mass (ICM, which will form the fetus) is also a very important to score and contributes to the overall grade of the embryo. This group of cells should be prominent in the cavity.