IUI vs IVF in 2026: Differences, Success Rates and Costs
IUI (intrauterine insemination) and IVF (in vitro fertilisation) are common types of fertility treatment, but they differ in terms of process, cost and success rate. This guide gives you an overview of the differences so you can get a better understanding of whether IUI or IVF is the right choice for you.
6 min. read
Key differences between IUI and IVF
IUI is less invasive, more affordable and better suited to aspiring parents with no or mild fertility challenges. IVF is more invasive and costly, but is particularly effective for aspiring parents with more severe fertility challenges or who require double donation.
*Sources: NHS, Total Fertility, MVZ Fertility Center Hamburg, Nij Geertgen and Trianglen Fertility Clinic.
What is IUI?
IUI (intrauterine insemination) treatment is a type of artificial insemination where healthy, high-quality sperm cells are placed directly into the uterus using a catheter. It can be performed using partner or donor sperm and increases the likelihood of successful fertilisation by filtering out low-quality sperm cells and reducing the distance sperm must travel to reach the egg. The IUI procedure is less invasive and more affordable than IVF.
Who is IUI recommended for?
IUI is often the first-line fertility treatment for:
- Single women or same-sex couples using donor sperm
- Heterosexual couples using donor sperm
- Couples in the early stages of fertility treatment
- Men with mild sperm quality issues
- Women with mild ovulation issues
- Unexplained infertility.
What is IVF?
IVF is a more complex assisted reproductive technology which involves retrieving an egg from the aspiring mother or a donor, and fertilising it with sperm in the laboratory. The resulting embryos are then transferred into the uterus to develop. IVF is more invasive than IUI but has higher success rates.
Who is IVF recommended for?
IVF is commonly recommended for:
- Women facing age-related fertility decline
- Couples or women facing fertility challenges such as blocked fallopian tubes, endometriosis or PCOS
- Couples who have had multiple unsuccessful IUI attempts
- Couples and solo mums needing donor sperm or donor eggs to start a family
- Severe male-factor infertility
- Instances when embryo freezing may be beneficial.
IUI vs IVF - success rates
IVF has higher success rates than IUI, though they are dependent on personal circumstances, such as age and fertility health.
What is the success rate of IUI?
IUI success rates (pregnancy rate) typically range from 5% to 15% per cycle, depending on factors like age and overall health. Younger women, especially those under 35, tend to have higher success rates, while chances decrease with age. Since pregnancy may not happen on the first try, women and couples undergoing IUI are often recommended to attempt multiple cycles.
It's important to remember that these success rates are often based on studies with infertile couples. It doesn't say much about success rates for younger women who are not infertile but are single or in a same-sex relationship.
What is the success rate of IVF?
IVF generally has higher success rates, ranging from 17% to 40% per cycle. Again, this depends on factors such as age and the quality of eggs and sperm. Women under the age of 35 have the highest IVF success rates. This rate decreases after the age of 40.
Choosing between IUI and IVF
Success rates, cost, treatment invasiveness, and your personal medical history will all influence which type of treatment is right for you and your situation.
Success rates
IVF has higher success rates than IUI, particularly among certain groups, including older women and aspiring parents with more severe fertility challenges. For younger women and aspiring parents with mild fertility challenges, IUI and IVF success rates are more comparable. In these cases, other decision factors may assume greater importance.
Costs
IUI is more affordable than IVF, though costs can vary significantly between clinics and countries. This makes it a more accessible fertility treatment, and a common first choice for aspiring parents with no known complicating factors. While IUI benefits from a lower cost-per-cycle, it is important to consider that IVF tends to have a higher success rate, often requires fewer cycles to achieve pregnancy, and may have a lower total treatment cost. Similarly, the public health system in some countries may subsidise several cycles of treatment, reducing the cost of some treatments and influencing your decision.
Medical history
Personal medical circumstances have a considerable impact on treatment choice. For instance, couples in which the male partner has poor sperm quality are more likely to be recommended IVF or ICSI to mitigate these challenges. Likewise, women with polycystic ovary syndrome (PCOS), endometriosis and blocked fallopian tubes are typically recommended IVF treatment. While aspiring parents facing mild fertility challenges may begin with IUI treatment, they often transition to IVF if several cycles are unsuccessful.
Treatment specifics
IVF is a longer, more complex and more invasive process than IUI. Consequently, if there are no modifying fertility factors, some aspiring parents prefer IUI. On the other hand, IVF may be a better option if aspiring parents want to freeze embryos for future use.
Personalised guidance from fertility specialists
Consulting your doctor or a fertility clinic is the best way to determine whether IUI or IVF is right for you. The decision will largely depend on personal circumstances, and aspiring parents always benefit from professional medical support and guidance when choosing between fertility treatments.
Using donor sperm with IUI or IVF
Using donor sperm to get pregnant is a common path to parenthood, and donor sperm is used in both IUI and IVF treatments by solo mums, same-sex couples and heterosexual couples facing male fertility challenges.
Treatment choice will often depend on personal circumstances. For instance, older aspiring mothers contending with age-related fertility decline may choose IVF as it benefits from higher success rates and allows for embryos to be frozen and stored for future use. In contrast, younger aspiring parents may prefer IUI, as it is more affordable and less invasive.
How does ICSI fit into IUI vs IVF?
ICSI is a type of IVF treatment in which a single, healthy sperm is injected directly into an egg in the laboratory. This differs from standard IVF, where the egg is mixed with large numbers of sperm cells that still have to reach, penetrate and fertilise the egg without help.
ICSI tends to be used to overcome male fertility challenges, such as a low sperm count, poor sperm motility and abnormal sperm morphology. It is also regularly used in cases of unexplained infertility, when standard IVF cycles are unsuccessful, or if using frozen eggs.
IUI vs IVF FAQs
IUI and IVF are suited to different people and circumstances, and one is not necessarily better than the other. When considering fertility treatments, you need to balance a variety of factors, including cost, success rates, treatment specifics and your own medical history. A fertility professional can help you reach an informed decision, and our own expert advisers are also available to provide guidance and information.
IVF has higher success rates than IUI among certain groups, including older women and couples and individuals with more severe fertility challenges. For other groups, such as younger women and couples and individuals with mild fertility challenges, the success rates are more comparable, and IUI might be preferred as it is more affordable and less invasive.
Doctors and clinics often recommend starting IVF after 3-6 failed IUI cycles, especially if you are over 35 years old.
Yes, donor sperm can be used in both IUI and IVF treatments. Generally, fertility specialists recommend MOT20+ donor sperm for IUI treatment and say MOT10+ is sufficient for IVF. However, if you choose MOT20+ straws, you know your donor sperm is suitable for both treatment types.
The main difference between IUI and IVF is how and where fertilisation occurs. With IUI, sperm are placed in the uterus using a catheter. They then “swim” to the egg and fertilise it. With IVF, the egg is retrieved from the body, mixed with sperm and fertilised in the laboratory, and the resulting embryos are transferred to the uterus to develop. Differences in treatment procedures result in distinct treatment costs and success rates.
Yes, IUI is usually cheaper than IVF, though precise costs depend on the number of treatment cycles required, treatment specifics and whether a sperm donor is used. Costs can also vary significantly between countries and clinics.
A single IUI cycle takes approximately two to four weeks, while an IVF cycle often takes three to six weeks. Despite an IUI cycle being shorter, IVF can result in a quicker pregnancy, as the higher success rates mean you may need fewer treatment cycles.
Take your next steps with European Sperm Bank
Choosing between IUI and IVF depends on your age, health, medical history and budget. At European Sperm Bank, our expert advisors provide tailored guidance, so you can make an informed decision.