Inside the Laboratory
Your Embryo’s Journey Begins with In Vitro Fertilisation
Immediately following egg retrieval, an embryologist in the laboratory examines the follicular fluid and collects the eggs into culture dishes. At the same time, semen is collected and prepared in the laboratory. In the afternoon of the same day, the embryologist mixes the eggs with the sperm for a conventional insemination, or they perform intracytoplasmic sperm injection (ICSI) where a single sperm is injected directly into an egg.
The day after egg retrieval, an embryologist evaluates your eggs under a light microscope to determine whether the eggs are fertilised. The fertilised eggs continue to be cultured in a special medium in an incubator under very precise environmental conditions.
Once fertilisation is confirmed, it is counted as embryo Day 1 (1-cell stage). Embryos which develop normally will continue to divide reaching the blastocyst stage usually by Day 5 (see picture below).