Intrauterine Insemination (IUI)

Not every couple experiencing infertility needs to begin with advanced treatments such as IVF or ICSI. In many cases, a simpler and less invasive method may help increase the chance of pregnancy.

Intrauterine Insemination (IUI) is one of the most common fertility treatments. During this procedure, sperm are prepared in the laboratory and placed directly inside the uterus at the most appropriate time in the menstrual cycle. This shortens the distance the sperm need to travel to reach the egg and may improve the chance of fertilization.

Because fertilization still takes place naturally inside the body, IUI is often considered one of the first treatment options for couples whose medical circumstances are suitable for this approach.

How does IUI help increase the chance of pregnancy?

During natural conception, sperm must travel through the female reproductive tract before reaching the egg.

In IUI treatment, a semen sample is first washed and prepared in the laboratory. This process separates sperm with better movement and quality from the seminal fluid and less suitable sperm.

At the time of ovulation, the prepared sample is placed directly inside the uterus using a very thin catheter.

This allows a greater number of healthy, motile sperm to reach the area closer to the egg and may improve the chance of fertilization for some couples.

Who may be a suitable candidate for IUI?

IUI is not suitable for every patient. The decision depends on the cause of infertility, the condition of both partners, and the results of medical evaluations.

IUI may be considered in the following situations:

Unexplained infertility

Sometimes routine fertility tests appear normal, but pregnancy still does not occur. In these cases, IUI may be considered as one of the first treatment options.

Mild reduction in sperm quality

If sperm count or motility is slightly below the expected range, but enough suitable sperm are available for laboratory preparation, IUI may help increase the chance of pregnancy.

Ovulation disorders

For some women, IUI is combined with ovulation-induction medication so that treatment can be timed more accurately around ovulation.

Cervical factors

In some cases, cervical mucus may make it more difficult for sperm to pass through the cervix. Placing prepared sperm directly into the uterus can help bypass this barrier.

Certain sexual or functional difficulties

When regular intercourse is difficult or not possible because of a medical or functional condition, IUI may be considered as one of the available treatment options.

How is IUI performed?

Treatment begins with an evaluation of the ovaries and the timing of ovulation.

Depending on the patient’s condition, the physician may prescribe medication to stimulate ovulation or may monitor a natural menstrual cycle without medication.

On the scheduled day, a semen sample is collected and prepared in the laboratory. During this process, seminal fluid and less motile sperm are removed, and the most suitable sperm are selected.

The physician then places the prepared sample inside the uterus using a thin, flexible catheter.

The procedure usually takes only a few minutes, is generally painless, and does not require anesthesia or hospitalization.

After IUI, the patient rests briefly and can usually return to normal daily activities.

Is IUI painful?

Most women experience only mild discomfort similar to a routine gynecological examination or a Pap test.

IUI does not involve surgery, incisions, stitches, or anesthesia and is usually completed within a few minutes.

Do underlying medical conditions or medications matter?

Yes. Conditions such as diabetes, thyroid disorders, high blood pressure, endometriosis, or certain autoimmune diseases do not always prevent IUI, but they may affect treatment planning or medication selection.

Both partners should also inform the physician about any medications they are taking and any history of surgery, chemotherapy, or radiotherapy before treatment begins.

No medication should be stopped or changed without medical advice.

What factors affect the success of IUI?

The outcome of IUI depends on several factors, including:

The woman’s age

Egg quality

Sperm count and quality

Whether the fallopian tubes are open

The cause of infertility

The number and development of follicles

Accurate timing of the procedure

The couple’s overall medical condition

Some couples may achieve pregnancy during the first treatment cycle, while others may require more than one attempt.

If pregnancy does not occur after several appropriately planned IUI cycles, the physician may recommend another treatment such as IVF.

Important Information

IUI is not the same as IVF

During IUI, fertilization takes place naturally inside the body. During IVF, fertilization occurs in the laboratory.

For this reason, IUI is a simpler and less invasive treatment.

IUI alone does not increase the chance of twins

If ovulation-induction medications are used with IUI, the chance of a multiple pregnancy may increase because more than one egg may develop.

The physician monitors follicle development carefully to help manage this risk.

Prolonged rest after IUI is not necessary

Most patients can return to normal daily activities shortly after the procedure unless their physician gives different instructions.