Navigating Your Treatment Options
For many people navigating infertility, the alphabet soup of treatment options — IUI, IVF, ICSI, FET — can feel overwhelming. Understanding the basics of the most common treatments helps you ask better questions, set realistic expectations, and feel more in control of your care.
This guide focuses on the two most widely used options: Intrauterine Insemination (IUI) and In Vitro Fertilization (IVF).
What Is IUI (Intrauterine Insemination)?
IUI is a relatively simple procedure in which washed, concentrated sperm is placed directly into the uterus around the time of ovulation. The goal is to increase the number of sperm that reach the egg in the fallopian tube, improving the chances of fertilization.
How the IUI Process Works
- Ovarian Monitoring: The cycle may be natural or stimulated with low-dose fertility medications (such as clomiphene or letrozole) to encourage one or two eggs to develop.
- Triggering Ovulation: An hCG injection is often used to precisely time ovulation.
- Sperm Preparation: A semen sample is "washed" in a lab to concentrate the healthiest, most motile sperm and remove seminal fluid.
- Insemination: A thin catheter is passed through the cervix and the sperm is deposited directly into the uterus. The process takes only a few minutes and is often described as similar in sensation to a smear test.
- Two-Week Wait: A pregnancy test is taken approximately 14 days later.
Who Is IUI Suitable For?
- Couples with unexplained infertility
- Mild male factor infertility (mildly low sperm count or motility)
- Cervical factor infertility (e.g., hostile cervical mucus)
- Single people or same-sex couples using donor sperm
- Those with ovulation issues (when used alongside medication)
IUI is generally not recommended when there is significant tubal damage or severe male factor infertility, as the chances of success are too low to justify the cost and time.
What Is IVF (In Vitro Fertilization)?
IVF is a more involved process in which eggs are retrieved directly from the ovaries, fertilized with sperm in a laboratory, and the resulting embryo(s) are transferred back into the uterus.
How the IVF Process Works
- Ovarian Stimulation: Injectable hormones are used over 8–14 days to stimulate the ovaries to develop multiple follicles (and thus multiple eggs).
- Monitoring: Regular blood tests and ultrasounds track follicle development.
- Egg Retrieval: A minor surgical procedure, done under sedation, uses a needle guided by ultrasound to collect eggs from the follicles.
- Fertilization: Eggs are fertilized with sperm in the lab — either by mixing them together (conventional IVF) or by injecting a single sperm directly into the egg (ICSI).
- Embryo Development: Fertilized eggs are cultured for 3–5 days, allowing embryologists to assess development.
- Embryo Transfer: One (or sometimes two) embryos are transferred to the uterus. Remaining viable embryos can be frozen for future use.
- Pregnancy Test: Approximately 10–14 days after transfer.
Who Is IVF Suitable For?
- Blocked or damaged fallopian tubes
- Severe male factor infertility (often combined with ICSI)
- Failed IUI cycles
- Endometriosis affecting fertility
- Diminished ovarian reserve
- Those wishing to use preimplantation genetic testing (PGT)
- Same-sex couples and single people using donor eggs or sperm
IUI vs. IVF: A Quick Comparison
| Factor | IUI | IVF |
|---|---|---|
| Invasiveness | Minimal — no surgery | More involved — egg retrieval under sedation |
| Typical Cost | Lower | Significantly higher |
| Success Rates | Generally lower per cycle | Generally higher per cycle |
| Time Commitment | Less intensive | More monitoring and appointments |
| Best For | Milder infertility causes | More complex infertility scenarios |
Important Considerations
Success rates for both treatments vary significantly based on age, diagnosis, clinic, and individual factors. It's important to review success data specific to your clinic and your age group rather than relying on generalised figures. Speak with a reproductive endocrinologist who can review your specific history and test results to recommend the most appropriate path forward.
Both IUI and IVF can be emotionally and physically demanding. Having good support — whether from a counsellor, a support group, or trusted people in your life — makes a meaningful difference throughout the process.