Blastocyst transfer in the mother s womb increases the chance of pregnancy.
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In a normal pregnancy, after fertilisation of the egg in the fallopian tube, the blastocyst undergoes development and gradually moves from the fallopian tube to the uterine cavity. This transfer takes about 5 days before the blastocyst gets established in the uterus. Hence, implantation of a blastocyst after maintaining it in laboratory conditions for about 2-3 days or to a maximum of 5 days is mainly done to provide the fertilised embryo with a favourable condition.
Blastocyst culture reduces the risk of multiple pregnancies.
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The extended period for the culture allows the embryologist to segregate the viable embryos that are the most suitable for pregnancy. For example, in case all five eggs get fertilised to form the embryo and all of them exist in the same healthy condition even 3 days after the fertilization, it will be difficult to identify which one will develop into a successful pregnancy. But an extended culture may exclude those fertilised embryos that do not survive after 3 days of culture. Only a single embryo may survive till day 5 and that can be established in the uterine cavity with certainty.
Which one of the following is a disadvantage of blastocyst culture?
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The extended culture period may have one particular disadvantage and that is the exclusion of all the embryos for transfer and implant in the uterus. This occurs because by day 5, the embryos that do not survive are excluded. So, there is a chance that all the embryos may not survive till advanced stages. Another demerit of blastocyst culture is that it does away with the possibility of other embryos to be cryopreserved for later implant.
Who are good candidates for blastocyst culture?
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Blastocyst culture is usually done for women who have had failed IVF pregnancy before. That might have happened because the embryos were no more viable 2-3 days after fertilisation. Another reason which makes women opt for a blastocyst culture is that the procedure enables the embryologist and the couple to save embryos for future implantation and pregnancy.
One of the riskiest procedures of IVF treatment is Blastocyst culture.
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Blastocyst culture is a stage in IVF treatment wherein after fertilisation of the eggs with the sperms, the embryo is observed in the laboratory culture for about 2-3 days. This stage is known as blastocyst culture after which the blastocyst or the embryo, cultured for 2-3 days, is implanted.
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