Intrauterine insemination (IUI) is usually the first step when a couple needs help to conceive: it is less invasive and less costly than IVF, and a single appointment takes only a few minutes. Put simply, IUI places a concentrated sample of your partner’s best sperm directly into the uterus at the time of ovulation, so that more active sperm reach the fallopian tube where fertilisation happens. This guide explains who IUI suits, how the cycle works step by step, the success rates, and when IVF may be a better option.
🦋 Quick answers
- What is IUI? A procedure where washed, concentrated sperm is placed directly into the uterus through a fine plastic tube at ovulation.
- How long does it take? The insemination itself usually takes about 5 minutes, on an outpatient basis.
- What is the success rate? Roughly 10–15% per cycle. Over half of women under 40 who have IUI conceive within 6 cycles.
- How many times can I try? Usually 3–6 cycles before considering IVF.
What is intrauterine insemination (IUI)?
IUI is a fertility treatment that involves inserting sperm into the uterus using a fine plastic tube (catheter). The goal is to ensure that as many active sperm as possible reach the fallopian tubes to fertilise the egg. Before insemination, the sperm sample is prepared in the laboratory: dead cells, seminal plasma and non-motile sperm are separated, leaving a concentrated solution of active sperm.
Who is IUI suitable for?
- Couples where the female partner has at least one unblocked fallopian tube.
- Couples where the male partner has low sperm motility or a low sperm count.
- Couples who have difficulty with sexual intercourse.
- Couples who have not conceived despite ovulation stimulation medication such as Clomid.
- Couples with unexplained infertility.
How does the IUI procedure work, step by step?
- Ovulation stimulation. The female partner is usually given medication or hormones to stimulate egg production.
- Monitoring. Ultrasound scans track the size and development of the follicles.
- Trigger injection. When the leading follicle reaches about 17–18mm, an HCG injection is given to mature the egg and trigger ovulation.
- Insemination. About 36 hours after the HCG injection, the IUI is performed on an outpatient basis. The male partner provides a sperm sample, which is processed in the laboratory, and the active sperm is inserted into the uterus through a fine tube. The procedure usually takes only about 5 minutes.
- Afterwards. You can go home straight away, and a pregnancy test is done at least 2 weeks later. An ultrasound scan is performed about a month after IUI to confirm the pregnancy.
What is the success rate of IUI?
The chance of pregnancy with IUI is approximately 10–15% per cycle. Success depends on your age, the cause of infertility, the sperm sample and how many follicles develop. According to the NHS, over half of women under 40 who have IUI will get pregnant within 6 cycles of treatment.
Many couples complete 3–6 cycles of IUI. If pregnancy has not happened after 6 cycles, IVF treatment is usually recommended, as it offers higher success rates per cycle.
What are the risks of IUI?
- Multiple pregnancy (usually twins) — more likely when ovulation stimulation produces several follicles.
- Ectopic pregnancy — where the pregnancy implants outside the uterus. This is uncommon but requires urgent attention.
- Temporary cramping or light spotting around the procedure — usually mild and short-lived.
IUI or IVF — which one do I need?
IUI is less invasive, less expensive and closer to a natural cycle, which is why it is often tried first. IVF, on the other hand, has higher success rates per cycle and offers more control over fertilisation and embryo selection. The right choice depends on your age, your fertility diagnosis, how long you have been trying, the sperm quality and whether the fallopian tubes are open. Our IUI or IVF quiz can help you prepare for that conversation with your doctor.
Frequently asked questions
Does IUI hurt?
Most women describe it as similar to a smear test — brief and mildly uncomfortable rather than painful. The insemination itself takes only a few minutes and no anaesthetic is needed.
How much does IUI cost in Malaysia?
The cost of IUI varies from clinic to clinic depending on medication, monitoring scans and the number of cycles. IUI is significantly less expensive than IVF. Your clinic can give you a personalised estimate for your treatment plan.
How soon after IUI can I take a pregnancy test?
At least 2 weeks (14 days) after the insemination. Testing earlier can be affected by the HCG trigger injection and may give a misleading result.
Do I need to rest after IUI?
No. You can return to your normal daily activities straight after the procedure. There is no evidence that bed rest improves the chance of pregnancy.
Related reading
- Fertility tests for couples: what to expect
- Age 35 and above: which fertility treatment is right for me?
- How to survive the two-week wait after IVF
Sources
- NHS — Intrauterine insemination (IUI)
- Human Fertilisation and Embryology Authority (HFEA) — Intrauterine insemination (IUI)
