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Blastocyst Culture and Transfer

At RMW we prefer to transfer embryos at the blastocyst stage. When an egg is fertilised it becomes an embryo. Embryos grow by dividing the cells inside them. At about day 5 an embryo is called a blastocyst.  Not all embryos have the ability to reach the blastocyst stage which is usually because there are inherent issues within the embryo, however if the embryo can become a blastocyst by day 5 or 6 it is more likely to result in a pregnancy.


As with early stage embryos, good quality blastocysts may be frozen and stored if there are any remaining following transfer.

Embryo Implantation