IVF over 40 is possible, but success rates using your own eggs decline significantly compared to younger age groups. HFEA data shows the average birth rate per embryo transferred for patients aged 40 to 42 is around 10%, compared to 35% for patients aged 18 to 34. For patients aged 43 to 44, the birth rate drops to around 5% (HFEA, Key Facts and Statistics, 2024).
This does not mean IVF at 40 is not worth pursuing. Many women in their forties do have successful treatment, particularly with the right clinical approach, realistic expectations, and consideration of options like donor eggs where appropriate.
This article covers what affects IVF success rates over 40, how NHS funding rules apply at this age, what treatment adjustments are commonly recommended, and what to look for when choosing a clinic. If you want to discuss your individual situation, book a free advisory call with IVF Matters to speak with a fertility specialist.
Why Does Age Affect IVF Success So Significantly?
Women are born with all the eggs they will ever have, and both the number and quality of those eggs decline over time. By your early forties, the remaining eggs are more likely to carry chromosomal abnormalities, which increases the risk of failed fertilisation, failed implantation, and miscarriage.
This is a different issue from ovarian reserve. Ovarian reserve (measured by AMH levels) tells you roughly how many eggs remain, but it does not tell you about egg quality. A woman over 40 can have a reasonable AMH level and still face lower success rates, because the quality of the eggs, not just the quantity, is what drives outcomes at this age.
This is also why treatment add-ons like pre-implantation genetic testing for aneuploidy (PGT-A) are more commonly discussed for patients over 40. PGT-A screens embryos for chromosomal abnormalities before transfer, helping to identify which embryos have the best chance of resulting in a healthy pregnancy. The HFEA notes that not all add-ons have strong evidence behind them, so it is worth discussing the specific evidence for PGT-A with your consultant based on your situation (HFEA, Women Over 38, 2016).
IVF Success Rates Over 40: What the Data Shows
Understanding realistic numbers helps you plan rather than guess. The table below shows HFEA-published birth rates per embryo transferred by age band.
| Age group | Birth rate per embryo transferred (2022) |
| 18 to 34 | 35% |
| 35 to 37 | Declining from peak, still favourable |
| 38 to 39 | Noticeably lower than under-35 group |
| 40 to 42 | 10% (up from 8% in 2012) |
| 43 to 44 | 5% (using own eggs) |
Source: HFEA, Key Facts and Statistics, 2024
Two things are worth noting in this data:
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First, success rates over 40 have genuinely improved over the past decade, from 8% to 10% for the 40 to 42 group, thanks to better laboratory techniques and embryo selection methods.
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Second, these are averages across the entire UK, including clinics with widely varying approaches to monitoring, protocol adjustment, and patient selection. Your individual chances depend heavily on your specific ovarian reserve, egg quality, and any underlying diagnosis, not just your age in isolation.
It is also worth asking any clinic for their live birth rate per cycle started, not just per embryo transferred, since the per-transfer figure only includes cycles that reached transfer and can overstate your realistic chances if fewer cycles make it that far.
Donor Eggs: When and Why They Are Considered
For women whose own egg quality significantly limits their chances, using donor eggs is one of the most effective ways to improve the odds of a successful pregnancy. Because donor eggs typically come from women in their twenties or early thirties, success rates using donor eggs remain considerably higher across all recipient age groups, in some cases exceeding 25 to 30% per cycle regardless of the recipient's own age.
The HFEA suggests that women considering treatment over 38 discuss donor eggs as one option among several, rather than treating it as a last resort only after multiple failed cycles.
At IVF Matters, this conversation happens as part of the initial consultation with Dr Irfana Koita, who reviews your ovarian reserve, previous treatment history, and personal preferences before recommending whether donor eggs should be part of the conversation, and at what stage.
Higher stimulation doses. Because egg yield tends to be lower, higher doses of stimulation medication are sometimes used to encourage the ovaries to produce as many follicles as possible. Closer monitoring. More frequent scans and blood tests help the consultant adjust the protocol in real time, since older patients may respond less predictably to standard doses. PGT-A testing. As discussed above, genetic screening of embryos before transfer can help identify the embryos most likely to result in a successful, ongoing pregnancy, reducing the emotional and physical toll of transferring embryos less likely to implant. Single embryo transfer policy. Because multiple pregnancy carries higher risk at any age, and particularly for older patients, many clinics recommend transferring a single, carefully selected embryo rather than two, especially when PGT-A results are available. Realistic cycle planning. Given the lower per-cycle success rate, your consultant may discuss planning for more than one cycle from the outset, including how many eggs or embryos might need to be frozen to support this. At IVF Matters, the fixed-price IVF package (£12,000) includes ICSI, ZyMot sperm selection, Embryoscope monitoring, and unlimited monitoring scans as standard, which supports the closer monitoring that older patients often benefit from without additional cost per scan. When success rates decline with age, the clinic you choose and how they manage your specific case matters more, not less. Several factors are worth prioritising when researching the best fertility clinic UK over 40 has to offer: Age-specific success rate transparency. Ask any clinic for their outcomes specifically for patients in your age bracket, not just their overall average, since averages can be skewed by a younger patient population. Willingness to discuss donor eggs early. A clinic that raises donor eggs as an option to consider, rather than avoiding the conversation, is generally being more honest about the numbers. Individualised protocol adjustment. Given how variably older patients respond to stimulation, a clinic offering consultant-led, closely monitored care (rather than a standardised protocol applied to everyone) tends to produce better-tailored treatment decisions. No unnecessary delay. Given the time-sensitive nature of fertility at this age, prioritise a clinic with no lengthy waiting list and the ability to start testing and treatment quickly. No, but success rates using your own eggs are meaningfully lower than for younger patients. Many women do conceive successfully with IVF at 40 and beyond, particularly with a well-managed protocol, and options like donor eggs remain available for those whose own egg quality is a limiting factor. The right approach depends on your individual ovarian reserve, health, and personal preferences. AMH indicates how many eggs remain (ovarian reserve), not their quality. A woman over 40 with a good AMH level may still have lower success rates than a younger woman with the same AMH, because egg quality declines with age regardless of quantity. AMH is useful for predicting how your ovaries will respond to stimulation medication, but it is not a reliable predictor of egg quality or overall chance of success. Because per-cycle success rates are lower, many specialists recommend planning for the possibility of more than one cycle from the outset, and discussing this financially and emotionally in advance rather than reassessing after each unsuccessful attempt. Cumulative success across two to three cycles is higher than the per-cycle rate alone, though the increase is smaller than for younger patients. Sperm quality does decline with age, though generally less dramatically than egg quality, and it matters less than the age of the egg provider for overall success rates. However, if the male partner is also over 40, a semen analysis and, in some cases, sperm DNA fragmentation testing are worth including in the initial workup. Maintaining a healthy weight, reducing alcohol intake, stopping smoking, and managing stress can support overall health during treatment, but lifestyle changes cannot reverse age-related decline in egg quality. That said, these changes can still meaningfully improve how your body responds to stimulation medication and recovers from procedures, so they remain worth prioritising alongside medical treatment. If you are considering IVF over 40 and want a clear, honest conversation about your individual chances, book a free advisory call with IVF Matters. You can also review the full success rates breakdown to understand how outcomes are measured and compared. HFEA — Key Facts and Statistics — Official UK fertility regulator data on IVF success rates by age HFEA — Women Over 38 — Regulator guidance on NHS funding, donor eggs, and treatment considerations for older patients IVF Matters — IVF Success Rates — Age-specific outcomes and comparison to UK averages IVF Matters — IVF Treatment in London — How IVF works at IVF Matters, including pricing and what is included IVF Matters — Treatment Prices — Fixed-price packages for IVF and all fertility treatments What Treatment Adjustments Are Common for IVF Over 40?
Choosing the Best Fertility Clinic UK Over 40
Frequently Asked Questions
Is 40 Too Old to Start IVF?
Does AMH Level Predict IVF Success at Age 40?
How Many IVF Cycles Should I Plan for Over 40?
Does Male Partner Age Matter for IVF Success Over 40?
Can Lifestyle Changes Improve IVF Success Over 40?
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