Day 0: is the day of egg retrieval. On this day the eggs are retrieved from the follicles and are counted and assessed for maturity/quality. The eggs will be inseminated with or without ICSI (Intracytoplasmic sperm injection) approximately 2-4 hours after the egg retrieval procedure. The eggs are then placed in the incubators overnight.
Day 6: All viable, high quality embryos are able to be cryopreserved on Day 6. Any non-viable embryos are then discarded. Day 6 is the last day that an embryo can remain in the laboratory without being transferred or cryopreserved.