When is IUI recommended, and when is it not?
Doctors recommend IUI for mild male factor, ovulation problems such as PCOS, unexplained infertility, mild endometriosis, problems at the neck of the womb and difficulty with intercourse. At least one tube must be open and enough good sperm must remain after preparation. Blocked tubes or very weak sperm usually need IVF instead.
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In this Hindi video, Dr Mayur Pai explains the situations in which IUI is usually considered, so that couples can understand whether it may suit them. This page sets out the same medical reasons in English, together with the situations where IUI is not the right step. If you are new to IUI, first read what IUI is and how it works.
How IUI helps, and why that matters
An indication is simply the medical reason for choosing a treatment. IUI can help in three ways. It places prepared, concentrated sperm high inside the womb, past its neck. It times the insemination precisely with the release of the egg. And, when combined with ovulation medicines, it can help one or two eggs grow and release on time. Each indication below relies on one or more of these.
The main reasons IUI is recommended
Mildly low sperm count or movement
When the count, movement or shape of the sperm is a little below normal, preparation in the laboratory gathers the most active sperm into a small volume placed right where it is needed, as described in sperm preparation for IUI. This helps in milder cases, not when the sperm are very few or very weak.
Ovulation problems, including PCOS
When eggs are not released regularly, ovulation medicines and scans help one or two eggs grow and release on time. IUI is often added when tablets with timed intercourse have not worked, or when there is another factor too, such as a mildly low sperm count. Read more in PCOS: causes and what the ultrasound shows.
Unexplained infertility
Sometimes every test is normal and pregnancy still has not happened. IUI with gentle ovulation medicines and careful timing is a common first step here, especially for younger couples, before moving to IVF.
Problems at the neck of the womb
If the mucus at the neck of the womb is thick or unfriendly to sperm, or the neck of the womb has been treated before with cautery or minor surgery, IUI simply carries the sperm past it.
Difficulty with intercourse
Problems with erection or ejaculation, pain during intercourse, or tightness of the vaginal muscles can make natural conception hard even when everything else is healthy. IUI uses a collected sample and places it at the right time. Please mention this openly; it is common, and we handle it with complete discretion.
Mild endometriosis
In milder endometriosis with open tubes, IUI with ovulation medicines may be tried, sometimes after a laparoscopy.
When the husband works away from home
When the husband works abroad or at sea and cannot be present at the right time, his own sample can sometimes be frozen in advance and used for the IUI. Ask us whether this suits your situation.
What must be in place first
IUI only makes sense when the basics allow it. Before starting, the doctor checks that:
- at least one tube is open and healthy
- enough active sperm remain after preparation
- ovulation happens, or can be helped with medicines
- the inside of the womb is healthy, with any polyp or fibroid inside the cavity dealt with first
- the woman's age and egg reserve allow some time to try
These checks are covered in the tests needed before IUI.
When IUI is not recommended
- Both tubes blocked or badly damaged. The sperm cannot meet the egg, so IVF is needed.
- Very few or very weak sperm after preparation. IVF with ICSI is usually advised.
- No sperm in the semen. Sperm may have to be retrieved directly and used with ICSI.
- Moderate or severe endometriosis. IVF, or surgery first, is usually more suitable.
- Time is short because of age or a very low egg reserve. IVF is often discussed sooner.
- Several well-timed IUIs have not worked. It is time to review the plan rather than repeat the same step.
- An active pelvic infection, which must be treated first.
Natural cycle or with medicines? The reason decides
The indication also shapes how the IUI is done. When the woman ovulates regularly and the reason lies at the neck of the womb or in difficulty with intercourse, the IUI can often be timed with her natural ovulation. With PCOS, medicines are needed to help an egg grow. With unexplained infertility, gentle medicines are commonly used. Whatever the plan, the scans watch the follicles so that the timing is right and too many eggs do not grow at once.
Where treatment happens
This guide is by Dr Mayur Pai, MBBS, MS (Obstetrics & Gynaecology), a fertility and laparoscopy specialist. Pai Hospital in Goa has its own operating theatre and its own IVF laboratory, so your tests, scans, sperm preparation and IUI are handled by one team, in one place. Free patient transport is available from across Goa.
Getting started
Not sure whether IUI suits you? Send your reports and your question to us on WhatsApp at +91 95185 02773. Consultations are by appointment, so please call our reception on +91 95459 20817 to book. Our treatment packages are transparent and fixed, so just ask us about the cost. This article is for education only and is not personal medical advice; please consult your doctor about your own situation.
Your questions
Can IUI be done if only one tube is open?
Often yes, as long as the open tube is healthy. The doctor checks the tubes before starting and watches on the scan which ovary is growing the egg. If the open tube is damaged, IVF is usually the more sensible route.
Is IUI useful for PCOS?
It can be. In PCOS the main problem is that an egg is not released regularly, so medicines help an egg grow and the scans time the IUI. It is often considered when tablets with timed intercourse have not worked, or when there is another factor such as a mildly low sperm count.
Can IUI help if my husband's sperm count is low?
When the count or movement is only mildly low, it can, because preparation gathers the active sperm into a small volume placed inside the womb. When very few active sperm remain after preparation, IVF with ICSI is usually advised instead.
Is IUI recommended for unexplained infertility?
Often, as a first step, especially for younger couples. When all the tests are normal, IUI with gentle ovulation medicines and careful timing is a reasonable place to start before moving on to IVF.
Do both partners need tests before IUI?
Yes. The woman needs a check of her tubes, ovulation and womb, and the man needs a semen analysis. The results decide whether IUI is suitable at all, and how it should be planned.
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This page is for general education and is not personal medical advice. Treatment depends on your own examination and reports, so please speak to a doctor about your situation. We do not carry out or offer sex determination of any kind.