What is blastocyst culture?
Blastocyst culture means to maintain the embryo in the laboratory inside the culture until day five.
In order to do successful blastocyst cultures it is important to have a highly modern laboratory and a team of qualified biologists. All this is to guarantee that the embryos can develop without difficulties.
What advantages has a blastocyst culture?
Transfers of embryos at blastocyst stage have proven to enhance significantly pregnancy rates compared to transfers of embryos on day two or three of their development.
The reason for the improvement of the results with blastocysts transfers is a better selection of the transferred embryos. More time with the embryos under observation in the laboratory means more information about their quality. Usually not all of the embryos reach the blastocyst stage due to their insufficient quality to produce a pregnancy. On the contrary, embryos reaching day five at blastocyst stage are those with higher probabilities to lead to pregnancy.
Can embryos in blastocyst culture be frozen?
With blastocyst culture, we will obtain less embryos for freezing but higher quality ones. The survival rate of frozen blastocyst embryos is significantly higher and increases chances for a pregnancy.
How many embryos should be transferred at blastocyst stage?
The blastocyst culture allows us to select embryos with higher implantation potential. Therefore, we can follow a more conservative approach when deciding the number of embryos for transfer. It all depends on the clinical history of each patient but in cases with good prospects, recommendation would always be to transfer only a single embryo.
Transferring one blastocyst embryo offers high pregnancy probabilities and reduces the risk of a multiple gestation.