Embryos which are developed using blastocyst transfer method are more likely to result in pregnancy than the normal ones. In addition, they progress better in the early stages of the embryo. Various studies show that the embryos which are developed by using the blastocyst method of development are found to be the healthiest ones, and have the capability to grow and survive. This is a result of natural selection.
The foremost advantage of blastocyst transfer method is that embryos which are developed using this method have the highest chances of resulting in pregnancy. Also, using the blastocyst transfer method, you can use the embryo of your preference. This means that one can use the best embryos and maintain successful pregnancy rates.