About 90% of women who commence a cycle will reach the transfer stage; most will have 1 or 2 embryos available. On average, there is a 50% chance that those reaching this stage will have more embryos than required for transfer. If couples wish, the healthy embryos not transferred may be frozen for later cycles. This allows you to attempt pregnancy again without going through the complete IVF process, avoiding stimulated egg growth and the accompanying injections. It is important to realize that not all embryos made in IVF labs will result in a pregnancy or will be suitable for freezing and a few may also not survive the freeze/thaw process.
Frozen embryos will be stored in specialised secure facilities by Next Generation Fertility.