Embryos are typically cultured for 3 days (cleavage stage with 4-10 cells) before being transferred into the uterus. Blastocyst culture allows the most advanced/competent embryo(s) to be selected for transfer on the fifth day following egg collection. By extending the culture to 5 or 6 days, embryos will develop the blastocyst stage which allows the Embryologist to select ideal embryos with better potential for implantation at the time of the transfer.
Another significant benefit of blastocyst culture is the reduction of multiple births that may result from IVF/ICSI.
Who need Blastocyst culture?