Intrauterine Insemination Iui

Overview

Intrauterine insemination (IUI) is a fertility treatment. It is sometimes called 'artificial insemination'. Sperm that has been washed and prepared in a lab is placed directly inside the womb (uterus) through a thin, soft tube. This happens close to the time your ovary releases an egg. The idea is simple: it puts a good number of healthy sperm closer to the egg, so the sperm has a shorter and easier journey. IUI does not replace having sex at home, and it is not the same as IVF (in vitro fertilisation), where eggs are collected and fertilised outside the body.

Yes. IUI is one of the most common and longest-used fertility treatments. It is cheaper and less invasive than IVF, so many clinics offer it as a first step, especially when the cause of fertility difficulty is unclear or mild.

It is for adults who are trying to conceive and have not been able to, or who cannot conceive through sex. This includes single people and same-sex couples using donor sperm. It may be suggested when sperm quality is mildly reduced, when the cervix makes it hard for sperm to get through, when ovulation is irregular, when fertility tests are normal but pregnancy has not happened, or when treatment such as freezing sperm before cancer treatment means timing needs to be planned.

Symptoms

Common symptoms

• IUI is a procedure, not an illness, so it has no symptoms of its own. What you may notice is mild period-like cramping during or just after the procedure.
• Light spotting or a small amount of pinkish discharge for a day or two afterwards.
• Some bloating or tenderness in the lower belly, especially if you used fertility medicines that stimulated your ovaries.
• Tiredness, mood swings, or headaches from hormone medicines, if they were part of your cycle.
• A short wait of about two weeks before a pregnancy test, which many people find the hardest part emotionally.

Symptoms in children

• Not applicable. IUI is a fertility treatment for adults and is not used in children.

Symptoms in older adults

• Fertility naturally falls with age, especially after the mid-30s, so IUI is less likely to succeed at older ages. Clinics usually discuss your chance of success honestly and may suggest other options. Age limits for NHS-funded treatment vary by area.

Causes

Main causes

• Mildly low sperm numbers or movement, where there are still enough good sperm for IUI to help.
• Ovulation that is irregular or does not happen every month, for example with polycystic ovary syndrome (PCOS).
• Problems with the cervix (the neck of the womb) or with semen being able to reach the womb.
• Unexplained infertility, where tests are normal but pregnancy has not happened after a year of trying.
• Needing donor sperm, for single people or same-sex couples, or after treatment that affected fertility.
• Physical or timing difficulties that make sex at the fertile window hard, or sperm that has been frozen before medical treatment such as chemotherapy.

Risk factors

• Age — success rates fall as the woman's age rises, particularly over 40.
• Smoking, in either partner, which lowers sperm and egg quality.
• Being very overweight or very underweight, which can affect ovulation.
• Heavy alcohol use and recreational drug use.
• Blocked or damaged fallopian tubes — these usually mean IUI is not suitable.
• Long-standing fertility problems or previous pelvic infection.
• High stress and poor sleep, which affect wellbeing even if their direct effect on fertility is uncertain.

When to see a doctor

See a doctor urgently if:

• Severe or one-sided belly pain, fainting, or shoulder-tip pain after IUI or around a possible pregnancy.
• Fever, smelly discharge, or worsening pelvic pain after the procedure.
• Heavy bleeding or pain that keeps getting worse.
• Severe bloating with breathlessness or very little urine after ovary-stimulating medicine.

Book a routine appointment if:

• You have been trying for a baby for a year (or 6 months if you are 35 or over) without success.
• Your periods are very irregular, very painful, or have stopped.
• You or your partner have a known fertility condition, or you have had cancer treatment that may affect fertility.
• You want to discuss fertility options as a single person or same-sex couple.
• You have had a previous ectopic pregnancy, pelvic infection, or surgery on your tubes or ovaries.

Diagnosis

IUI is a treatment rather than a diagnosis, so the first step is a fertility assessment to see whether it is a good fit for you. This usually starts with a conversation about your periods, your medical history, and how long you have been trying. Both partners are usually checked. The clinic then explains the likely chance of success and whether IUI, IVF, or simply more time is the best next step.

Tests that may be done

• A semen analysis (sperm count, movement, and shape) from the partner or donor.
• Blood tests to check hormone levels and confirm that you are ovulating.
• A pelvic ultrasound scan to look at the womb and ovaries and count follicles.
• A test to check the fallopian tubes are open, such as a special X-ray or an ultrasound-based dye test.
• Screening blood tests for infections such as HIV and hepatitis, which clinics require before treatment.
• Sometimes a check of ovarian reserve (egg supply) using hormone levels and follicle counts.

What to expect at your appointment

On the day, you will usually be in and out of the clinic within an hour. You may be asked to arrive with a full bladder, as this can make the womb easier to see on ultrasound. The clinic first prepares the sperm sample, which takes a little time. Then you lie on a couch, a speculum is gently placed (like a smear test), and a thin tube passes through the cervix. You may feel a brief cramp. Afterwards you rest for a few minutes and then go home and carry on with your normal day.

Treatment

IUI is usually done as a planned cycle, timed to when you ovulate. In a 'natural' cycle, scans and urine tests track your ovulation. In a 'stimulated' cycle, you take fertility medicine for a few days to encourage one or two eggs, with ultrasound scans to watch them grow. When the eggs are ready, the prepared sperm is placed in the womb. Some clinics also give a hormone injection to trigger ovulation at a set time. You then wait about two weeks before a pregnancy test.

Self-care at home

• Take the medicine exactly as your clinic explains, and ask them if anything is unclear.
• Keep a simple diary of your cycle, scan dates, and how you feel, so you can raise patterns with your team.
• Avoid smoking, cut back on alcohol, and aim for a healthy weight — these make a real difference to fertility.
• Carry on with gentle everyday activity after the procedure; there is no need to lie down or rest for long.
• Take folic acid as advised before and during early pregnancy — your pharmacist or clinic can tell you the right amount for you.
• Plan something kind for the two-week wait, as the waiting is often the hardest part.

Medical treatments

The core treatment is the insemination itself. Many cycles also include fertility medicines — tablets or injections that encourage the ovaries to release an egg — plus ultrasound monitoring and sometimes a hormone injection to time ovulation. These medicines are prescribed and supervised by a fertility specialist, who will explain the risks such as multiple pregnancy and ovarian hyperstimulation. Your clinic may also suggest treatment for specific issues found in testing, and will advise on the best number of cycles before reviewing your plan. This article does not recommend any particular medicine; your specialist will match treatment to your situation.

When is surgery considered?

Surgery is not part of IUI. However, if tests show badly blocked or damaged fallopian tubes, or conditions such as endometriosis or fibroids that might be affecting fertility, your specialist may discuss an operation or suggest a different treatment such as IVF instead of IUI.

Living with this condition

Treatment cycles bring appointments, scans, and timing that can take over your calendar. Try to keep some ordinary routines going — work, exercise, seeing friends — and to agree in advance with your partner or support person how much you will talk about each stage. Many people find it helps to decide early how many cycles they are willing to try, so the decision-making stays in their hands.

Lifestyle tips

• Stop smoking, and ask for help if you need it — this is one of the single biggest things either partner can do.
• Keep alcohol low or avoid it while trying to conceive.
• Aim for regular, moderate exercise rather than extreme training, which can affect ovulation.
• Protect sleep and build in downtime; treatment is tiring emotionally as well as physically.
• Avoid overheating the testicles (hot baths, laptops on laps, tight clothing) if you are providing sperm.
• Check any medicines, supplements, or herbal products with your pharmacist or clinic before starting a cycle.

Diet and exercise

There is no special fertility diet, but a balanced pattern of eating helps: plenty of vegetables and fruit, wholegrains, beans and lentils, nuts, and moderate amounts of dairy or alternatives, with fish or other proteins. Take folic acid as advised. Drink water through the day and keep caffeine moderate. Aim for about 150 minutes of moderate activity a week — walking, swimming, cycling, or yoga all count. If your weight is very high or very low, your clinic can offer supportive, non-judgemental help, as this can improve your chance of success.

Mental health and emotional wellbeing

Fertility treatment is emotionally demanding. It is very common to feel hope and grief in the same week, to feel jealous of friends' pregnancies, or to argue more with your partner. Feeling low or anxious does not mean you are failing. If sadness or worry is affecting your sleep, work, or relationships for more than a couple of weeks, please tell your clinic or your family doctor — support is available and effective. If you ever have thoughts of harming yourself, please contact your local crisis service or emergency services straight away.

Prevention

You cannot always prevent the fertility problems that lead to IUI, but you can lower some risks. Not smoking, limiting alcohol, staying active, and aiming for a healthy weight all support fertility in both partners. Protecting yourself from sexually transmitted infections reduces the risk of damaged tubes. If you are having treatment that can affect fertility, such as chemotherapy, ask about preserving sperm or eggs beforehand. If you are not ready for a pregnancy, using reliable contraception avoids unplanned pregnancy.

Screening programmes

Before IUI, clinics routinely screen both partners for infections such as HIV, hepatitis B and C, and sometimes other infections, as required by local rules. Routine cervical screening (smear tests) should be up to date. If you have a family history of fertility problems or an early menopause, speak to your doctor about whether earlier assessment is sensible for you.

Complications

If left untreated

• IUI is a choice rather than something you must have, so 'untreated' mainly means the fertility problem continues. For many people, pregnancy simply takes longer or needs a different kind of help.
• Causes of infertility that go unchecked may get harder to treat with time, particularly as age affects egg quality.
• Some underlying conditions, such as untreated thyroid problems or infections, can affect general health as well as fertility.

Long-term outlook

The outlook is genuinely hopeful for many people. Success rates vary a lot depending on age, the reason for treatment, and whether donor sperm is used — often somewhere between roughly 1 in 10 and 1 in 5 per cycle for many couples, and lower over 40. Many clinics suggest 3 to 6 cycles, and if IUI does not work, it gives useful information and opens the door to other options such as IVF. IUI is a low-risk procedure: infection and significant complications are uncommon. Whatever happens, you are not alone, and your care team is there to adjust the plan with you.

Find support

External links open third-party websites. Ruqelo Health is not responsible for external content. Listing an organisation does not imply endorsement.