Genea was the first clinic in Australia to introduce the gold standard of routine Day 5 (blastocyst) embryo transfers. Growing the embryos in the lab a little longer before transferring allows us to determine which embryos have the highest development potential and increases success rates. The time between Day Three and Day Five in an embryo’s life is critical because it is when an embryo switches genetic control from the maternal genome to the embryo’s own genome. This culture process is more difficult than it sounds and simply cannot be done successfully without highly experienced embryologists and a leading incubation system as part of the lab process. We have given our patients world leading success rates with this advancement for years, some other Australian clinics still routinely transfer embryos earlier than Day Five.