How Does Age Affect Your Uterus and Donor Egg IVF Success?
Planning to undergo donor egg IVF abroad? If you’re in your 40s or beyond, you may be wondering how your age could affect your chances of pregnancy, even when using donor eggs.
Published on 19 October 20266m
Dr Madhurima Rajkhowa
Consultant Gynaecologist & Subspecialist in Reproductive Medicine
Much of the discussion around fertility and ageing focuses on declining egg quality. However, there’s another important factor to consider: the health of your uterus and its ability to support a pregnancy.
Although both the ovaries and uterus change with age, they don’t age in the same way. While egg quality declines significantly over time, the uterus may continue to support a pregnancy later in life. However, uterine health and your overall medical condition remain important when considering fertility treatment.
Donor egg IVF can help address age-related challenges associated with egg quality, but it doesn’t eliminate every factor that may influence pregnancy outcomes.
So, how does ageing affect your uterus, and what should you know before considering donor egg IVF?
Dr Madhurima Rajkhowa, a UK-based Consultant Gynaecologist and Subspecialist in Reproductive Medicine who contributes her expertise to TMTC (The Medical Travel Company) explains the relationship between age, uterine health and donor egg IVF success.
What Happens to Your Ovaries as You Age?
Ovarian ageing is the main driver of reproductive ageing. You are born with a finite supply of eggs, and both their number and genetic quality change as you grow older.
Changes in egg quality are particularly important in IVF. As eggs age, they become more likely to have an incorrect number of chromosomes. This is known as aneuploidy, and it can affect embryo development and the chances of successful implantation.
How Does Age Affect IVF Success With Your Own Eggs?
The chances of IVF success using your own eggs generally decline with age, largely because of changes in egg quality.
Live birth rates per IVF cycle are highest among younger age groups, often around 40-50% or higher for people under 35, depending on the clinic, treatment and individual circumstances.
By around 38-40, live birth rates using your own eggs may be around 15-25%. After 42, they can fall below 10%. Exact figures vary considerably between clinics and individuals, so it is important to discuss national and clinic-specific statistics with your fertility specialist.
Estimated rates of chromosomal abnormalities also rise substantially with age. Why does this matter? The greater the likelihood of chromosomal abnormalities in an egg, the fewer embryos may be suitable for transfer. This is one of the main reasons IVF success using your own eggs declines so sharply as you get older.
As a result, older patients may have fewer embryos suitable for transfer following each egg collection. They may also need multiple retrieval cycles to obtain a single euploid embryo, meaning an embryo with the expected number of chromosomes.
According to the Human Fertilisation & Embryology Authority, preimplantation genetic testing for aneuploidy (PGT-A) may be considered in certain circumstances. Although PGT-A cannot reverse ovarian ageing, it checks embryos for chromosome abnormalities before transfer and may help your doctor select embryos with the expected number of chromosomes.
Does Your Uterus Age Too?
Yes, your uterus also undergoes age-related changes, but these differ from ovarian ageing.
Although the uterus can carry a pregnancy later in life, ageing can affect several aspects of uterine health.
- The structure of the uterus: Fibroids, endometrial polyps and adenomyosis become more common with age. These conditions can sometimes affect the uterine cavity or the environment in which an embryo needs to implant.
- The endometrium, or uterine lining: On ultrasound, a healthy uterine lining often has a distinctive three-line appearance, known as a trilaminar pattern. This is considered a useful sign when assessing the uterus before embryo transfer.
Both factors can influence uterine receptivity, which refers to how well the uterine lining can support an embryo as it attaches.
Does Donor Egg IVF Affect Pregnancy Success Rates?
Donor egg IVF can make a significant difference. As the eggs typically come from a younger donor, often under 35, much of the age-related decline in egg quality is removed from the equation.
The embryo's chromosomal potential is therefore influenced primarily by the age and quality of the donor egg, rather than the age of the person receiving the embryo.
Success rates with donor eggs can remain around 50-55% per embryo transfer for recipients from their 20s through their late 30s. However, rates vary depending on the treatment, clinic, embryo quality and individual circumstances.
The important point is how these rates change with age. With donor eggs, success tends to decline more gradually than with IVF using your own eggs, particularly throughout the 40s.
Can Donor Eggs Overcome the Effects of Age?
Donor eggs address one of the biggest age-related challenges in IVF: declining egg quality. However, they do not completely eliminate the effects of ageing.
Research into donor egg cycles has helped researchers distinguish the effects of egg age from those associated with the age of the person carrying the pregnancy. Once egg quality is largely removed from the equation, a gradual decline in clinical pregnancy and live birth rates becomes more apparent at older recipient ages, particularly from around the mid-40s onwards.
Several factors may contribute to this, including:
- Uterine receptivity
- Blood flow
- Changes in uterine structure
- Overall health: Conditions such as high blood pressure and diabetes become more common with age and can increase pregnancy-related risks.
Research has identified a noticeable change around the age of 49, with clinical pregnancy and live birth rates declining and miscarriage rates increasing. This does not mean donor egg IVF is unsuitable for everyone at this age. Rather, it highlights the importance of a thorough medical assessment and individualised care.
Does Paternal Age Affect IVF Success Rates?
Although donor eggs can reduce much of the impact of egg ageing, paternal age can still influence embryo development and the chances of treatment success.
Research suggests that paternal age above 45 may be associated with:
- Lower blastocyst development: A blastocyst is an embryo that has developed to the stage at which it can be considered for transfer or freezing.
- Lower pregnancy rates: This effect has been observed in donor egg IVF cycles, even when younger donor eggs are used.
- Changes in embryo quality: Advancing paternal age can still influence embryo development, meaning younger donor eggs do not eliminate every age-related factor.
For couples considering fertility treatment, looking at both partners' ages and reproductive health gives the fertility specialist a more complete picture of their options.
Considering Donor Egg IVF? Here’s What to Do Next
The key takeaway is that your uterus does age, but it ages differently from your ovaries.
Ovarian ageing has a major impact on fertility, while uterine ageing and overall health become increasingly important considerations as you get older.
If you are considering donor egg IVF, particularly later in life, an individual assessment of your fertility and overall health is far more useful than focusing on age alone.
This is where The Medical Travel Company can help. By bringing together UK-based fertility guidance and trusted treatment partners in India, TMTC supports patients throughout their treatment journey. From 24/7 medical assistance and dedicated concierge services to help with travel arrangements, we also take care of the practical details surrounding your treatment.
If you are exploring donor egg IVF and considering options beyond the UK, visit our website to learn more and arrange a free call with Dr Madhurima Rajkhowa to discuss whether treatment in India could be right for you.
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