Maximising Your Chances with a Dual Approach
A tandem cycle combines the use of your own eggs alongside donated eggs within the same treatment cycle. This approach is ideal for women who still produce some eggs but wish to optimise their chances of success by also having donor embryos available. It offers peace of mind and a higher overall chance of achieving pregnancy.
How a Tandem Cycle Works
Both you and an egg donor undergo synchronised ovarian stimulation. Your eggs and donor eggs are retrieved at a similar time and fertilised using your partner’s (or donor) sperm via ICSI. Your own embryos are prioritised for transfer first. If they do not result in pregnancy, the donor embryos provide an immediate alternative — all within the same cycle.
Key Benefits of Tandem Cycle
- Combines personal genetics with a safety net of donor embryos
- Reduces the risk of a completely failed cycle
- No waiting between attempts if own embryos are unsuccessful
- Ideal for women with borderline ovarian reserve
- Emotionally reassuring for patients wanting to try with own eggs
Who Is a Good Candidate for Tandem Cycle?
- Women with low ovarian reserve who still produce some eggs
- Those who have had mixed results in previous IVF cycles
- Women aged 38-45 who want to try their own eggs but seek a backup
- Patients with a history of poor embryo quality
- Those who wish to preserve the possibility of a genetic connection
Tandem Cycle Treatment Timeline
Week 1-2
Consultation, testing, and synchronisation of donor and recipient cycles begins.
Week 3-4
Both you and the donor undergo ovarian stimulation simultaneously.
Week 5
Egg retrieval from both you and the donor. All eggs fertilised via ICSI.
Day 3-5
Your embryos and donor embryos develop in parallel. Best quality selected.
Transfer Day
Your own embryo transferred first. Remaining embryos frozen.
2 Weeks Later
Pregnancy test. If unsuccessful, donor embryos are ready for a frozen transfer.
Frequently Asked Questions About Tandem Cycle
Your own embryos are always given priority for transfer. Donor embryos are used only if your embryos do not result in successful implantation.
Tandem cycles involve both a donor and your own stimulation, so costs are higher than a standard cycle. However, the increased chance of success often makes it cost-effective overall.
Yes. Any good-quality embryos — both your own and donor — that are not transferred can be vitrified (frozen) for future use.
If none of your own embryos lead to pregnancy, the frozen donor embryos from the same cycle are available for transfer without needing to start a new stimulation.