Since the outer surface of the blastocysts is very thin, the likelihood of attachment to the uterine surface increases. These embryos are also called selected embryos. Most fertilised eggs develop by the third day and only 40 % of these eggs reach the blastocyst stage.It is also important that the conditions of the IVF centre are suitable for the blastocyst transfer and that it is successful.
- Laboratory conditions
- Adequate and high quality equipment
- Knowledgeable and experienced team in the field
- Experienced embryologist who carefully observes