A fertility treatment that places prepared sperm inside the uterus around ovulation.
Intrauterine insemination (IUI) is a fertility procedure in which specially prepared sperm are introduced directly into the uterus near the time an egg is released. It may be considered for selected couples and individuals after a fertility assessment.
Learn how IUI works, what to expect during treatment, and the factors that may influence its suitability and outcome.
Book a Consultation Explore the ProcessIntrauterine insemination is an assisted conception procedure. A semen sample is processed in the laboratory to concentrate motile sperm and remove seminal fluid. The prepared sperm are then placed into the uterus using a thin catheter.
IUI is usually timed around ovulation, which may occur naturally or following prescribed ovulation-induction medication. The sperm may then travel through the uterus toward the fallopian tubes, where fertilisation can occur if an egg is available.
Your fertility specialist will consider the cause of infertility, age, ovarian function, fallopian tube status, semen analysis and other relevant clinical factors.
IUI may be considered as part of a treatment plan when initial investigations have not identified a specific cause of infertility.
It may be an option in selected cases with mild sperm abnormalities, depending on the semen analysis and the number of motile sperm available after processing.
IUI may be used with appropriately screened donor sperm when chosen as part of an individualised fertility plan.
For some patients with ovulatory disorders, IUI may be considered alongside medication to support ovulation, after appropriate evaluation.
IUI may be discussed when intercourse or ejaculation difficulties make conception difficult, if other clinical factors are suitable.
The fertility team may discuss IUI in other selected circumstances after reviewing the patient’s history, investigations and preferences.
The exact schedule depends on whether the cycle is natural or uses fertility medication and on the clinic’s monitoring protocol.
The clinician reviews the medical and reproductive history of both partners, relevant investigations, ovulation, fallopian tube status and semen analysis.
The team determines whether IUI will be performed in a natural cycle or with ovulation-induction medication. The plan is individualised.
Ultrasound monitoring and, when indicated, hormone tests help assess follicular development and determine the appropriate timing for insemination.
A semen sample is collected or an approved stored/donor sample is used. The laboratory processes it to concentrate suitable motile sperm.
A clinician passes a thin catheter through the cervix and places the prepared sperm into the uterus. The procedure usually takes only a few minutes.
Most patients can resume usual activities according to the clinic’s advice. Mild cramping or light spotting may occur temporarily.
The clinic advises when to take a pregnancy test. Follow instructions about prescribed medicines and contact the clinic if you have concerns.
| Feature | Natural-cycle IUI | Stimulated IUI |
|---|---|---|
| Cycle approach | Uses the patient’s natural ovulation. | Uses prescribed medication to support follicular development or ovulation. |
| Monitoring | Ovulation is tracked to help time insemination. | Monitoring is used to assess the response and help manage treatment timing and safety. |
| Medication | May not require ovarian stimulation medication. | Medication is used when clinically indicated. |
| Important consideration | Suitability depends on ovulation and other fertility factors. | Stimulation can increase the risk of multiple pregnancy; careful monitoring is important. |
Important: Whether IUI is appropriate depends on the individual clinical situation. It is not necessarily the most suitable treatment for every person experiencing infertility.
IUI outcomes vary considerably between patients. There is no single success rate that accurately describes every age group, diagnosis, treatment protocol or clinic.
Factors that may influence the chance of pregnancy include:
Ask your fertility specialist for outcome information relevant to your diagnosis and age. Clarify whether figures refer to pregnancy per cycle, clinical pregnancy or live birth.
Some patients experience temporary discomfort or light spotting after catheter insertion.
Infection after IUI is uncommon, but it is a recognised potential complication.
When ovulation-induction medication is used, more than one egg may develop. This can increase the chance of twins or higher-order multiple pregnancy.
Ovarian stimulation medicines may cause side effects and, in some circumstances, ovarian hyperstimulation syndrome (OHSS). The risk depends on the medication and individual response. Monitoring and treatment adjustments are important.
Contact your clinic promptly if you develop fever, severe or worsening pain, heavy bleeding, or other symptoms that concern you. Seek urgent medical attention for severe symptoms.
IUI stands for intrauterine insemination. It is a procedure that places prepared sperm directly into the uterus around the time of ovulation.
No. In IUI, sperm are placed inside the uterus and fertilisation may occur inside the body. In IVF, eggs are collected and fertilisation takes place in a laboratory.
IUI is usually brief and may cause mild discomfort or cramping. Experiences vary, and the clinic can explain what to expect.
The insemination itself usually takes only a few minutes once the sperm sample has been prepared. Monitoring and sample preparation take additional time.
No. Pregnancy depends on several factors, including age, the cause of infertility, ovulation, fallopian tube function and sperm parameters.
No. IUI may be performed during a natural ovulatory cycle or with medication, depending on the patient’s clinical circumstances and treatment plan.
It may be considered in selected cases of mild male-factor infertility. More significant sperm abnormalities may require discussion of other treatment options.
Yes. IUI may be performed using appropriately screened donor sperm when this is suitable and permitted under applicable requirements.
Yes. The chance of multiple pregnancy may increase when fertility medicines stimulate the development of more than one follicle. Your clinician should discuss monitoring and risk management.
Follow the date advised by your fertility clinic. Testing too early may give a misleading result, particularly if an ovulation-trigger medication has been used.
Many patients can return to their usual activities soon after the procedure. Follow any individual instructions provided by your treating team.
Your fertility specialist can review the cycle, investigations and treatment response and discuss whether another IUI cycle or a different approach, such as IVF, should be considered.
Every fertility journey is individual. A consultation can help you understand your investigations, discuss whether IUI may be suitable and review other available treatment options.
Contact Femelife IVF & Fertility Care to discuss your next steps.
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