If you have been trying for a baby without success, you are not alone — the World Health Organization estimates that about 1 in 6 people of reproductive age experience infertility at some point. When couples come to us, the two treatments they ask about most are IUI and IVF. This guide compares IVF vs IUI — how each works, who each suits and how your doctor decides where to start.
IVF vs IUI at a glance
| IUI (intrauterine insemination) | IVF (in vitro fertilisation) | |
|---|---|---|
| Where fertilisation happens | Inside the body, in the fallopian tube | In the laboratory, then the embryo is placed in the uterus |
| Medicines | None, tablets, or low-dose injections | Daily hormone injections for about 8–12 days |
| Procedure | A quick OPD procedure, no anaesthesia | Egg collection under short anaesthesia, then embryo transfer |
| Fallopian tubes | At least one open, healthy tube is needed | Tubes are not needed |
| Sperm | Needs a reasonable number of moving sperm | Works even with very low counts, using ICSI |
| Time per cycle | About 2 weeks | About 4–6 weeks, start to pregnancy test |
| Cost and intensity | Lower | Higher |
What is IUI?
In IUI, the man’s semen sample is “washed” in the lab to separate the healthiest, most active sperm. Around the time of ovulation, these sperm are placed directly into the uterus through a thin, soft tube. This shortens the distance the sperm have to travel, but fertilisation still happens naturally inside the body.
How an IUI cycle works
- Ovulation support: tablets such as letrozole, or low-dose injections, to help one or two eggs mature (sometimes IUI is done in a natural cycle).
- Follicle monitoring: two or three ultrasound scans to track the growing egg.
- Trigger injection: given when the follicle is ready, so ovulation happens at a predictable time.
- Insemination: about 24–36 hours later. It takes a few minutes and feels similar to a Pap smear.
- Pregnancy test: about two weeks later.
Who IUI suits
- Women with irregular ovulation, such as PCOS, who have not conceived with tablets alone
- Mild male-factor infertility (slightly low count or motility)
- Unexplained infertility in younger women
- Couples using donor sperm, or with difficulty having intercourse
IUI only works if at least one fallopian tube is open, so a tubal test (HSG or sono-HSG) is usually done first.
What is IVF?
In IVF, hormone injections stimulate the ovaries to grow several eggs. The eggs are collected in a short procedure and fertilised with sperm in the laboratory. The embryos grow in an incubator for three to five days, and then one embryo is placed in the uterus. Extra good-quality embryos can be frozen for later. Read our step-by-step guide to the IVF process for what each stage involves.
Who IVF suits
- Blocked or damaged fallopian tubes
- Moderate to severe male-factor infertility — here IVF is combined with ICSI, where a single sperm is injected into each egg
- Low ovarian reserve (low AMH) or a woman aged over 37–38, where time matters
- Endometriosis affecting fertility
- Several unsuccessful IUI cycles
- Couples who want genetic testing of embryos, or who need donor eggs
How doctors decide between IVF and IUI
The decision is based on tests for both partners, not one:
- Ovarian reserve: an AMH blood test and an antral follicle count on ultrasound
- Ovulation and hormones: thyroid, prolactin and, where needed, other hormone tests
- Fallopian tubes: HSG or sono-HSG
- Semen analysis: count, movement and shape of sperm
- Age and time trying: both strongly affect the chance of success with each treatment
Guidelines differ around the world. The UK’s NICE fertility guideline, for example, does not routinely recommend IUI for unexplained infertility and suggests IVF after two years of trying. Many specialists offer younger couples with open tubes and normal semen a few IUI cycles first, because it is simpler and less expensive. A good doctor will explain why a particular plan suits you.
How many IUI cycles before moving to IVF?
Most pregnancies from IUI happen within the first three to four cycles. If IUI has not worked by then — or sooner if the woman is older or the AMH is low — it is usually time to discuss IVF rather than repeating the same treatment.
When should you see a fertility specialist?
- After 12 months of regular, unprotected intercourse if the woman is under 35
- After 6 months if she is 35 or older
- Straight away if periods are irregular or absent, or with known PCOS, endometriosis, previous pelvic surgery, repeated miscarriages or a known male-factor problem
Frequently asked questions
Is IUI painful?
Most women feel only mild cramping, similar to a Pap smear. No anaesthesia is needed and you can go back to normal activities the same day.
Can we go straight to IVF without trying IUI?
Yes, when the tests show IUI is unlikely to work — for example blocked tubes, a very low sperm count or low ovarian reserve. In these situations, trying IUI first only uses up valuable time.
Does every IVF cycle need ICSI?
No. ICSI is mainly used when there is a sperm problem or fertilisation failed in an earlier IVF cycle. Otherwise, conventional IVF, where eggs and sperm are placed together, works well.
Do I need to stay in hospital for IVF or IUI?
No. IUI is an OPD procedure. In IVF, egg collection and embryo transfer are day procedures, and you go home the same day.
IVF and IUI at Umang IVF, Hadapsar
At Umang IVF in Hadapsar, Pune, Dr. Asha Gavade, gynaecologist and infertility specialist, evaluates both partners and recommends the simplest treatment with a good chance of working for you — from ovulation induction and IUI to IVF and ICSI in our own IVF laboratory. Message us on WhatsApp at +91 83798 58585 or call +91 98907 99898 to book a consultation with Dr. Asha Gavade. OPD: Monday–Saturday, 10 AM–2 PM.
References
- World Health Organization — 1 in 6 people globally affected by infertility (2023)
- NICE guideline CG156 — Fertility problems: assessment and treatment
- HFEA — Intrauterine insemination (IUI)
- HFEA — In vitro fertilisation (IVF)
- NHS — IVF
Medical disclaimer: this article is for general information and does not replace a consultation. Every pregnancy and every body is different — please speak to your doctor about your own situation.