Blastocyst Transfer

Blastocyst Transfer

Blastocyst Transfer has become possible due to technological advancements and new culture media. The blastocyst is a characteristic stage in embryonic development. It is often described as a mass of cells surrounding a fluid-filled cavity (blastoceol). This stage is often viewed approximately five days after fertilization. The blastocyst is the stage prior to the hatching process. Therefore, after reaching the blastocyst stage the embryo usually sheds the zona pellucida (outer protein matrix) and then implants in the endometrium.


 

The main advantage of blastocyst transfer is that it enables the embryologist to observe the embryos for a longer period of time. This often reveals important information on the quality of the embryo and its potential to continue maturation. In addition, blastocyst transfer has helped decrease the incidence of multiple pregnancies. Often only two blastocysts are transferred, and the success of pregnancy is higher or comparable to that of 8-cell stage embryo transfer.

This type of transfer is often recommended for couples that have repeatedly failed to conceive or for those who fear higher order pregnancies.