IUI Procedure Step by Step, and When to Take a Pregnancy Test After IUI

IUI stands for intrauterine insemination. It is a fertility treatment in which sperm are washed, concentrated and placed directly into the uterus around the time of ovulation, giving them a head start toward the egg. It is simpler, shorter and less invasive than IVF, and it is often the first treatment doctors suggest when the cause of difficulty is mild or unexplained. This guide explains who IUI suits, each step of the procedure, what it feels like, and, because it’s the question everyone asks, exactly when to take a pregnancy test after IUI.

What Is IUI?

IUI in a Nutshell

In IUI, prepared sperm is placed in the uterus with a thin, soft catheter at the right moment of your cycle. Fertilisation still happens inside your body, in the fallopian tube, exactly as it would naturally. That is the key difference from IVF, where fertilisation takes place in the laboratory. See IUI vs IVF: which one do you actually need .

Who May Benefit From IUI?

IUI is considered when the basic requirements are in place: at least one open fallopian tube, a healthy uterus, and enough healthy sperm after preparation. It may suit:

• Unexplained infertility, when tests find no clear cause.
• Mild male-factor problems, such as a slightly low sperm count or reduced movement. See male infertility symptoms most men ignore and how to read a semen analysis.
• Ovulation problems, such as PCOS, when combined with medicines that trigger ovulation. See PCOS and pregnancy.
• Mild endometriosis, or cervical mucus problems that stop sperm getting through.
• Difficulty with intercourse, where natural conception isn't possible.

IUI is usually not the right choice if both fallopian tubes are blocked, the sperm count or quality is severely low, endometriosis is severe, or the woman is older and time is limited. In these cases IVF is often more effective. A tube check, such as an HSG, is usually done before IUI to make sure the tubes are open.

IUI Step by Step

An IUI cycle usually takes place over about two weeks. Every plan is individual, but the steps are:

• Evaluation — Tests for both partners, including a semen analysis, a tube check, and a review of ovulation. See how female infertility is diagnosed.
• Ovulation stimulation (if needed) — Tablets or injections encourage one or a few eggs to mature. Some cycles use no medicines and follow your natural ovulation.
• Monitoring — Ultrasound scans, and sometimes blood tests, track the growth of the follicle(s) so the timing is right.
• Trigger injection — When a follicle is mature, an injection is timed to release the egg. The insemination is planned for roughly a day or so afterwards.
• Sperm collection and preparation — On the day, a fresh sample is provided and "washed" in the laboratory. This separates the healthiest, most active sperm and removes the rest of the fluid.
• Insemination — The prepared sperm is placed in the uterus through a thin catheter passed through the cervix. The procedure takes only a few minutes.
• A short rest — Many clinics ask you to lie down for a few minutes afterwards, then you can go home and carry on with normal life.
• Support and waiting — Some women are given progesterone to support the uterine lining. Then comes the wait, and the pregnancy test about two weeks later.

What Does the Procedure Feel Like?

IUI is quick and usually causes little discomfort. It is similar to a routine pelvic examination or Pap test: a speculum is placed, and the catheter is passed through the cervix. Some women feel mild cramping. No sedation or anaesthesia is needed, and you can usually go home straight away and resume normal activities.

When to Take a Pregnancy Test After IUI

This is the question every IUI patient asks. The short answer: test about 14 days (two weeks) after the IUI, or on the date your clinic gives you.

• Wait about 14 days — It takes time for a fertilised egg to travel, implant, and make enough pregnancy hormone (hCG) to be detected. Most clinics schedule a blood test, or advise a home test, around two weeks after IUI.
• Don't test in the first week — Most trigger injections contain hCG, which can stay in your body for up to a week or two. If you had one, a test taken at 5, 7 or even 10 days can show a false positive from the injection. A very early negative can also be wrong.
• Use first-morning urine, or the clinic's blood test — A blood hCG test is more sensitive and gives a clearer answer.
• If it's positive — Your clinic will usually confirm it with a blood test, and arrange an early ultrasound a couple of weeks later to check the pregnancy.
• If it's negative — Your period will usually follow. If it is delayed, repeat the test and speak to your clinic. A negative result is hard, and you are not to blame for it.

What About Symptoms After IUI?

Mild cramps, bloating, tender breasts, tiredness and light spotting are common in the two weeks after IUI, and they happen whether or not you are pregnant. Hormones from stimulation and progesterone support cause many of them. No symptom, and no lack of symptoms, reliably tells you whether the cycle has worked. Contact your clinic if you have severe pain, heavy bleeding, fever, or marked swelling.

Risks and Side Effects

IUI is considered low-risk, but it's good to know what to expect:

• Mild cramping or light spotting after the procedure.
• Multiple pregnancy. If stimulation produces several mature eggs, twins or more are possible, which is why monitoring matters.
• Ovarian over-response. With stronger injectable stimulation, this is uncommon but possible.
• A small risk of infection, which is why sterile technique is used.
• A slightly higher chance of ectopic pregnancy, as with other fertility treatments, so an early scan is important.
• Emotional strain, which is real and deserves support.

How Many IUI Attempts Are Reasonable?

Doctors commonly advise a limited number of IUI cycles, often around three or four, before reconsidering the plan, because the benefit of repeating the same treatment tends to level off. The right number depends on your age, the cause, and how your body responds. see why an IUI cycle doesn't work and what to do next.

What Affects IUI Success?

No honest doctor can promise an outcome. The main factors are:

• The woman's age, which strongly affects egg quality and quantity.
• The cause of infertility, and whether it suits IUI.
• Sperm quality after preparation.
• Open fallopian tubes and a healthy uterus.
• The number of mature eggs and the accuracy of timing.
• General health and lifestyle. For how long conception normally takes

Common IUI Myths

IUI is a gentle, well-understood first step for many couples. Knowing each stage, and when the test can be trusted, takes much of the uncertainty out of the wait.

Frequently Asked Questions