Fertilisation

IVF
Your eggs are mixed with your partner’s sperm and cultured in the laboratory for 16–20 hours. They are then checked to see if any have fertilised.

ICSI
Your eggs are injected with your partner’s sperm and cultured in the laboratory for 16–20 hours. They are then checked to see if any have fertilised.

Those that are showing signs of normal fertilisation are grown in the laboratory incubator for another one - two days. The best one or two embryos will then be chosen for transfer. In women aged 41 or over, consideration may be given to transfer 3 embryos, if they are available.