Donor sperm IUI in the UK: Success rates and what to expect

For single women, same-sex female couples and others who need donor sperm to conceive, IUI with donor sperm can offer a relatively simple and minimally invasive route to trying for a baby. 

But how successful is donor sperm IUI? What happens during treatment? How do you choose a sperm donor? And when might IVF be a better option? 

Here, we explain donor sperm IUI in the UK, including what can affect success rates and what to expect at each stage. 

Donor sperm IUI at a glance 

• What is donor sperm IUI? A prepared sample of donated sperm is placed directly into your womb around the time of ovulation. 

• Who can have it? It can be an option if you’re a single woman, part of a same-sex female couple or need donor sperm for another reason, as long as IUI is suitable for you. 

• How long does it take? At CRGH, consultations, investigations and preparation beforehand usually take around four to six weeks. The procedure itself takes around 10 minutes. 

• Will I need fertility medication? Not necessarily. Some people can have IUI without ovarian stimulation or medication. 

• What affects IUI success? Your fertility and reproductive health are important factors, so there isn’t one success rate that applies to everyone. 

• When can I take a pregnancy test? At CRGH, you’ll take a home pregnancy test 14 days after IUI. 

What is IUI with donor sperm? 

Intrauterine insemination (IUI) is a fertility treatment that can use either a partner’s sperm or donor sperm. 

During IUI, a concentrated sperm sample is placed directly into your womb using a small, flexible tube. The procedure is timed around ovulation to give the sperm the opportunity to meet and fertilise an egg. 

It’s a short procedure and should cause no more discomfort than a cervical smear test. For some people, IUI offers a less invasive route than IVF and could involve less fertility medication, or potentially none at all. 

Who can have IUI with donor sperm in the UK? 

You might be exploring donor sperm IUI because you’re planning to become a parent on your own, you’re in a same-sex female couple, or donor sperm is the right route for your family for another reason. 

Whether IUI is suitable for you will depend on your fertility, medical history and reproductive health. Generally, IUI requires at least one open, healthy fallopian tube so that sperm can reach an egg. Your specialist will also consider factors including your ovulation and ovarian reserve. 

Before treatment at CRGH, you’ll usually have fertility investigations. These can include an ovarian reserve assessment, which helps your specialist understand the number of eggs remaining in your ovaries, and a 3D HyCoSy to assess your uterus and whether your fallopian tubes are open. 

Your results will help establish whether IUI is appropriate for you and plan your treatment. 

What are the success rates for IUI with donor sperm? 

It’s natural to want to understand success rates when deciding whether donor sperm IUI is right for you. However, there isn’t one figure that accurately predicts what will happen for everyone. 

Your age is one important factor, as fertility generally declines with age. Your ovarian reserve and whether you ovulate regularly can also help your fertility specialist understand your individual chances of treatment working. 

The health of your fallopian tubes matters too, as sperm needs to be able to travel through a fallopian tube to meet an egg. 

Your treatment plan may also make a difference. Some people have IUI in a natural cycle, while others use ovarian stimulation, depending on their fertility and individual circumstances. 

When looking at IUI success rates, it’s also important to understand whether a figure refers to the chance of pregnancy from one treatment cycle or the chances over several cycles. 

How does using donor sperm work in the UK? 

If you have treatment using donor sperm at a UK-licensed fertility clinic, there are rules in place around sperm donation, including donor screening, consent and the information recorded about donors. 

Sperm donors are screened for certain infections and inherited conditions before their sperm can be used for treatment. There are also rules around what information a donor-conceived person can access about their donor. 

Your clinic can explain what these rules mean for you and your future family, as well as the information available when choosing a donor. 

What to expect during the IUI with sperm donation process 

At CRGH, your donor sperm IUI journey will generally involve the following stages. 

Step 1: Your first consultation and fertility tests 

Your first appointment is a chance to talk about your medical and fertility history, your plans for starting or growing your family and any questions you have about IUI or donor sperm. 

You’ll then have the fertility investigations needed to understand whether IUI is right for you and plan your treatment. 

Step 2: Finding your sperm donor 

Choosing a sperm donor can feel very different from the medical side of treatment, and you might not immediately know which information or characteristics are most important to you. 

Donor profiles can provide information to help you decide. What’s available will depend on the sperm bank but might include physical characteristics and other non-identifying information about the donor. 

CRGH’s andrology team can talk you through your options and help you find a suitable donor. Donor sperm can also be sourced through other recognised sperm banks. 

Step 3: Preparing for IUI 

Some IUI cycles involve ovarian stimulation, while others take place without fertility medication, sometimes known as natural IUI. 

If stimulation is part of your treatment, you’ll take medication and have monitoring so your clinical team can follow how your ovaries are responding and time the IUI appropriately. 

Your specialist fertility nurse will take you through the process, including how and when to take any medication you’ve been prescribed. 

Step 4: The IUI procedure 

When it’s time for IUI, a small, flexible tube is passed through your vagina and into your womb. A concentrated sample of donor sperm is then placed directly into the womb. 

The procedure is quick and you’ll be able to go home afterwards. 

Step 5: The two-week wait 

After your IUI, you’ll wait 14 days before taking a home pregnancy test. 

For many people, this can understandably feel like one of the longest parts of treatment. You might find yourself noticing every change in your body or wondering whether something is a sign that treatment has worked. 

Whatever the outcome, we provide support to help you understand what happens next. 

How long does donor sperm IUI take? 

At CRGH, consultations, fertility investigations and preparation before IUI usually take around four to six weeks. 

Some tests need to happen at particular points in your menstrual cycle, so your individual timeline can vary. You’ll also need to allow time to arrange your donor sperm if you haven’t already done so. 

The IUI procedure itself takes around 10 minutes. 

Is donor sperm IUI safe? 

The IUI procedure itself is generally considered safe. You might experience mild, period-like cramping during or shortly after the procedure. 

If ovarian stimulation is used, there are additional risks to consider. One is multiple pregnancy, such as twins or triplets, because stimulation can cause more than one follicle to develop. Multiple pregnancies carry a higher risk of complications, including premature birth. 

At CRGH, your response to stimulation and the number of developing follicles are monitored to help minimise this risk. 

Donor sperm IUI vs IVF: what’s the difference? 

Both IUI and IVF can use donor sperm but the treatments work differently. 

With IUI, prepared donor sperm is placed directly into your womb around the time of ovulation. If fertilisation happens, it takes place inside your body. 

With IVF, your ovaries are stimulated so several eggs can mature. The eggs are collected and fertilised with donor sperm in the laboratory before a suitable embryo is transferred into your uterus. 

For some people, IUI may be an appropriate place to start. For others, fertility investigations might show that IVF is a more suitable route. 

What if donor sperm IUI doesn’t work? 

A negative pregnancy test after spending two weeks hoping for a positive one can be difficult but it doesn’t necessarily mean the end of your IUI journey. 

Depending on your fertility, medical history and previous treatment, you might decide to try another IUI cycle or explore another fertility treatment, such as IVF with donor sperm. 

There isn’t one number of IUI cycles that’s right for everyone. Your specialist will consider factors including your age, fertility test results and previous treatment when discussing whether another IUI cycle or a different treatment may be appropriate. 

What support is available when using donor sperm? 

Using donor sperm can bring questions that go beyond IUI itself, including how you feel about donor conception and how you might talk about it with your future child. 

Alongside our specialist fertility counselling, we work closely with Donor Conception Network (DCN), a parent-led and child-centred organisation supporting people and families using donor conception. DCN offers information, workshops, groups and resources for different family types and stages of family life. 

This means support is available not only while you’re considering or going through treatment, but also as your family grows. 

Is donor sperm IUI right for me? 

Donor sperm IUI offers a minimally invasive way to try for a baby and for some people it could be a good alternative to IVF. 

Understanding your fertility is always a useful place to start. Your investigations can help establish whether IUI is suitable and give you a clearer picture of the options available to you. 

Book a consultation with the CRGH fertility team to start exploring your options. Your first appointment is a chance to understand your fertility, ask the questions that matter to you and work out what your next step could look like.