If you’ve been through one or more IVF cycles that haven’t led to a pregnancy, it’s natural to feel disappointed, tired and unsure what to do next. You may be wondering what went wrong, whether something was missed, or whether trying again is worth it.
An unsuccessful cycle can leave you with questions about what happened and whether another attempt may be worthwhile. Each cycle provides information about how your ovaries respond, how fertilisation occurs and how embryos develop, although it may not always explain why pregnancy did not occur.
In this guide, we explain the most common repeat IVF challenges, what they may point to, which tests can help, and the options that may be worth discussing with your specialist.
What Counts as a Repeat IVF Challenge?
Some people experience the same difficulty across several IVF cycles, such as a lower-than-expected number of eggs, low fertilisation, embryos that stop developing or transfers that do not lead to pregnancy. Pregnancy loss is a separate experience that may also call for its own assessment. These are descriptions of what happened rather than diagnoses in themselves.
Each stage of an IVF cycle gives your specialist useful information. How your ovaries respond to medication, how many eggs are collected, how they fertilise and how embryos grow all help build a clearer picture of what may be happening.
Why Can IVF Cycles Be Unsuccessful?
IVF outcomes can be affected by the embryo, eggs, sperm, uterus, general health and chance. Chromosomal differences in embryos become more common as egg age increases and are one important reason an embryo may not develop or implant, but a specific cause cannot always be identified.
Your chances can be influenced by:
• Egg number and quality: Both change with age. As eggs age, a higher proportion of embryos have chromosomal abnormalities, which can stop them implanting or lead to miscarriage.
• Sperm health: Sperm count, movement and other characteristics can influence fertilisation. Further sperm tests are considered when there is a specific clinical indication.
• The uterus: Conditions such as fibroids, polyps, adenomyosis or scar tissue can affect implantation.
• Your general health: Thyroid function, blood sugar levels, body weight and smoking can all play a part.
• Chance: Even a good quality embryo transferred into a healthy uterus doesn’t always implant. Sometimes there’s no clear explanation for a single unsuccessful cycle.
Age is one of the biggest factors in IVF success. As we explain in Factors Affecting Fertility: Age, Lifestyle & Health, fertility generally starts to decline in the early thirties, with a more noticeable change from the mid-thirties.
Common Repeat IVF Challenges and What They Can Mean
Different challenges point to different parts of the process. Here’s what your specialist will usually consider for each one.
Low Egg Numbers or a Poor Response to Stimulation
If fewer eggs than expected are collected, your specialist may review ovarian reserve assessments, the stimulation response and whether a different protocol is worth considering. AMH and antral follicle count can help estimate likely egg numbers, but cannot directly measure egg quality or predict pregnancy on their own.
Eggs That Don’t Fertilise
When few or no eggs fertilise, the egg and sperm factors and the laboratory findings are reviewed. A repeat semen analysis may be appropriate. ICSI, in which one sperm is injected into a mature egg, can be considered after low or failed fertilisation, but it does not improve outcomes for every patient.
Embryos That Stop Developing
Embryos sometimes stop developing before the blastocyst stage, usually reached around day five or six. This may relate to chromosome differences or egg and sperm factors, and may have no clearly identifiable cause. Your specialist can review the pattern from previous cycles. Growing embryos to blastocyst can support selection when appropriate, but may leave no embryo available for transfer in some cycles.
Repeated Implantation Failure
Repeated implantation failure refers to unsuccessful transfers of embryos considered capable of developing into a pregnancy, often enough in an individual person to warrant further discussion or assessment. There is no single number of unsuccessful transfers that defines it for everyone. Your specialist considers age, embryo-related factors, previous transfers and any signs of uterine problems before recommending tests.
Recurrent Pregnancy Loss
Recurrent miscarriage is generally defined by RANZCOG as two or more intrauterine pregnancy losses before 20 weeks. Assessment is individualised and may consider the uterus, relevant medical conditions and, in selected situations, chromosome testing. Additional treatments or embryo testing are not automatically recommended for everyone.
Cycles Cancelled Before Egg Collection
A cycle may be cancelled if too few follicles grow, if ovulation happens early, or if there’s a high risk of ovarian hyperstimulation. A cancelled cycle can be frustrating, but it often gives your specialist information that helps them choose a better approach next time.
Repeat IVF Challenges at a Glance
This table gives a general overview. Your own plan will depend on your age, test results and treatment history.
| Challenge | What it may point to | Tests that may help | Options to discuss |
|---|---|---|---|
| Low egg numbers | Lower ovarian reserve | AMH blood test, ultrasound | Reviewing the protocol; storing embryos over several cycles |
| Low fertilisation | Sperm or egg factors | Semen analysis | ICSI |
| Embryos stopping early | Egg or sperm quality | Review of embryo development | Adjusting stimulation or laboratory approach |
| Repeated implantation failure | Embryo chromosomes, uterine factors | Targeted uterine tests, blood tests | Treating identified causes; PGT-A only after counselling uterine conditions |
| Recurrent pregnancy loss | Embryo chromosomes, uterine or clotting factors | Targeted tests, chromosome testing, uterine assessment | Treating identified causes; PGT-A only after counselling identified causes |
| Cancelled cycles | Low or uneven response | Hormone monitoring | Reviewing the medication or protocol |
What Tests May Help After Unsuccessful IVF Cycles?
After unsuccessful treatment, the first step is often a careful review of what happened in each cycle. Further investigations are selected according to your history and whether the result is likely to change care.
Depending on your history, this may include:
1. A full review of your previous cycles, including medication, response, egg numbers, fertilisation and embryo development.
2. Targeted blood tests, such as thyroid function or blood sugar assessment, when symptoms, medical history or previous results make them relevant.
3. An updated ovarian reserve assessment if it would help guide planning, particularly after a significant interval or a change in circumstances.
4. A pelvic ultrasound, with further uterine investigations such as hysteroscopy only when indicated by symptoms or imaging.
5. A semen analysis when appropriate; sperm DNA fragmentation testing is not a routine test for everyone after unsuccessful IVF.
6. Chromosome testing for one or both partners in selected circumstances, such as part of an individualised recurrent miscarriage assessment.
Not every test is needed for everyone. Your specialist can explain which ones are likely to be useful for you, and which are unlikely to change your plan.
What Can Change in Your Next IVF Cycle?
Your next cycle doesn’t have to be a repeat of the last one. Depending on what previous cycles have shown, your specialist may suggest changes such as:
• A different stimulation protocol: Changing the type, dose or timing of medication to suit how your ovaries responded.
• ICSI: If fertilisation was lower than expected.
• Growing embryos to blastocyst: This may help with embryo selection in some cases, although there are trade-offs when few embryos develop.
• Genetic testing of embryos: PGT-A screens for certain chromosomal differences. Routine use has not been shown to improve cumulative live-birth rates for all IVF patients, and its value should be discussed alongside the possibility of having fewer embryos available for transfer.
• Frozen embryo transfer: This may be appropriate if embryos are already stored or if there is a clinical reason to delay transfer, such as a high response to stimulation. It is not automatically more successful than a fresh transfer for everyone.
• Treating a uterine condition: Such as removing a polyp or fibroid before the next transfer.
• Health and lifestyle changes: Supporting a healthy weight, stopping smoking and limiting alcohol for both partners.
A Note on IVF Add-Ons
Some additional treatments promoted after unsuccessful IVF, including endometrial scratching and immune therapies, have limited or conflicting evidence. Ask what a proposed add-on is intended to address, what evidence supports improved live birth, what risks are involved and what it costs.
When to Consider Donor Eggs, Donor Embryos or Surrogacy
For some people, repeated cycles show that their own eggs, sperm or uterus are unlikely to lead to a pregnancy. When this happens, your specialist may talk with you about other pathways to parenthood.
Egg donation may be an option if egg number or quality is the main barrier. Embryo donation may suit people where both egg and sperm factors are involved. If the uterus is unable to support a pregnancy, surrogacy may be considered. In Australia, only altruistic surrogacy is permitted, and there are legal and counselling steps involved.
These can be big decisions. There’s no pressure to make them quickly, and counselling is part of the process.
Looking After Yourself Through Repeat IVF
Repeat IVF can take a real emotional, physical and financial toll. It’s common to feel grief after each unsuccessful cycle, to find the waiting hard, and to feel stretched by the cost of treatment.
A few things may help. Taking a break between cycles can give you time to recover and reset. Talking with a fertility counsellor can help you process what’s happened and make decisions about what’s next, and psychological support is available to all our patients. Understanding your treatment costs and any Medicare rebates you may be eligible for can also help you plan.
How Many IVF Cycles Should You Try?
The number of cycles someone chooses depends on age, egg and sperm factors, previous results, the physical and emotional experience and personal priorities. Your specialist can discuss likely outcomes without promising that further treatment will work.
For some people, trying again with a few changes makes sense. For others, a different pathway may offer a better chance. Your specialist can talk you through your realistic
chances with your own eggs, so you can decide what feels right for you. Some people also find a second opinion helpful after several unsuccessful cycles.
Your Next Step
An unsuccessful IVF cycle can be difficult to process. At Create Fertility Melbourne, reviewing previous results can help identify what is known, what remains uncertain and whether a different approach is worth considering.
Whether you’ve had treatment with us or elsewhere, we can talk through what your cycles have shown and what your options may look like from here. If you’d like a clearer picture, you can have a conversation with our team.
Frequently Asked Questions
Why did my IVF fail with a good quality embryo?
A visually good-quality embryo can still have chromosomal differences that are not apparent under the microscope, and implantation is affected by other factors too. A single unsuccessful transfer does not necessarily indicate a uterine problem. Your specialist can explain whether further investigation is justified.
What is repeated implantation failure?
There is no universal threshold based only on a fixed number of transfers. Your specialist will review the circumstances and expected chance of implantation before deciding whether more assessment may help.
Should I change clinics after a failed IVF cycle?
A single unsuccessful cycle doesn’t necessarily mean you need to change clinics. After several unsuccessful cycles, a second opinion can be helpful. A fresh review of your cycles and test results may highlight changes worth trying, or confirm that your current approach is still the right one.
How long should I wait between IVF cycles?
Many people can start another cycle after one or two menstrual cycles, though timing depends on your health, how you responded and how you’re feeling. Some people choose a longer break to recover physically and emotionally. Your specialist can help you decide what timing suits your situation.
Does PGT-A improve IVF success?
PGT-A provides information about certain chromosomal differences in embryos. It does not create healthy embryos and has not been shown to improve cumulative live-birth rates for everyone. Whether it is useful in a particular case depends on the circumstances and its limitations.
When should I consider donor eggs?
Donor eggs may be worth discussing if previous cycles have shown very low egg numbers or consistently poor embryo quality, often linked to age or a low egg reserve. It’s a personal decision, and your specialist and a fertility counsellor can help you understand your chances with your own eggs before deciding.
