Blastocyst Culture And Transfer. Embryos are typically cultured for 3 days cleavage stage. Blastocyst culture is not used in all cases as it depends on various factors but basically on the number of embryos available to transfer.
The blastocyst stage on day 5 or day 6 the blastocyst contains two different cell types the inner cell mass which develops into the fetus and an outer layer of cells called trophectoderm which develops into the placenta. Blastocyst stage embryo transfer increases pregnancy rates compared to cell stage transfer at 2 3 days of development. Extended blastocyst culture.
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Advantages of blastocyst culture reduces the risk of multiple pregnancies pregnancy and implantation success rate is higher a competent embryo is transferred to the uterus. This in turn means that significantly fewer embryos are required to be transferred in order to establish a successful pregnancy. What are the risks of a blastocyst transfer. Embryos can be cultured in the lab for up to 5 6 days when provided with good nutrition in terms of media and environment.