Starting a whānau is an exciting journey, but if things aren’t happening as quickly as you hoped, it’s natural to start looking into fertility treatments like IUI (intrauterine insemination) and IVF (in vitro fertilisation). Both options are designed to help you achieve your dream of parenthood, but they work in different ways and are suitable for different circumstances.
At Repromed, we understand how confusing some of the terminology can be. That’s why our fertility experts have created this simple guide to help you understand the key differences between IUI and IVF so you can feel more informed and confident about the next steps on your fertility journey.
What is IUI?
IUI, or Intrauterine Insemination, is a process in which specially prepared sperm is placed directly into the uterus, making it faster and easier for it to ‘swim’ to its target (the egg) and increase the chance of conceiving.
IUI is often recommended if:
- There is unexplained infertility and semen analysis results are within a normal range
- Fallopian tubes are clear
- You’re using donor sperm
- You’re a single parent or part of the LGBTTQIA+ community
The IUI process typically involves:
- Ovulation tracking or stimulation: Medications may be used to induce or regulate ovulation.
- Sperm preparation: A lab selects the highest-quality sperm for insemination.
- Insemination: The prepared sperm is gently inserted into the uterus using a thin catheter during ovulation – similar experience to having a smear test.
IUI is relatively quick, minimally invasive, and is often considered a good first step in fertility treatment.
What is IVF?
With IVF, or In Vitro Fertilisation, eggs are collected and mixed or injected (ICSI -Intra-Cytoplasmic Sperm Injection) with prepared sperm in the clinic laboratory. The fertilised egg/s then develop into embryos that are monitored in the lab for up to 5-6 days, to observe their development, and then one high-quality embryo is placed back into the uterus to hopefully begin a successful pregnancy.
Additionally, any excess embryos that meet the freezing criteria can then be stored for future embryo transfer cycles, thus increasing the opportunities for further chances of creating a pregnancy from each egg collection cycle.
IVF is suitable if:
- There are blocked or damaged fallopian tubes
- There are sperm quality issues
- You are using donor eggs or surrogacy
- You have age-related egg quality issues
The IVF process involves:
- Ovarian stimulation with medication to produce multiple eggs
- Egg retrieval under sedation
- Fertilisation in the lab (or via ICSI if needed)
Embryo development and selection - Embryo transfer and the option to freeze excess embryos
IVF often has higher success rates per cycle than IUI, particularly for those with more complex fertility challenges or for those who are over 37 years old.
Key differences between IUI and IVF
| Factor | IUI | IVF |
|---|---|---|
| Invasiveness | Less invasive, no ovarian stimulation is required | More invasive, ovarian stimulation is required |
| Procedure type | Similar to a smear test | Surgical egg collection |
| Injections and tests | Minimal | Daily injections and several blood tests |
| Fertilisation | Fertilisation happens in the body | Fertilisation happens in the lab |
| Cost | Lower cost | Higher cost |
| Success rates | Lower, especially for people older than 37y | Higher, additional chances of success when embryos are frozen |
| Best for | Mild fertility challenges | Complex fertility challenges |
How to decide between IUI and IVF
Choosing between IUI and IVF depends on several factors, including your age, fertility history, sperm quality and personal preferences. While IUI is less invasive and can be an effective, budget-friendly first step, IVF generally offers higher success rates, especially for those who are facing more significant fertility challenges.
If you’re over the age of 37, you might be advised to progress with IVF to increase your chance of pregnancy, but your Repromed fertility doctor will work closely with you to determine the best approach for your unique situation. Our goal is to make sure you feel supported and informed at every stage of your journey.
Frequently asked questions
How do I know if I should start with IUI or go straight to IVF?
Your Repromed doctor will help assess your situation and talk you through your options. In general, if you’re younger with mild fertility challenges, IUI may be suitable. If you’re over 37 or have more complex needs, IVF is likely to be recommended.
Does IVF always work better than IUI?
IVF usually has higher success rates per cycle, especially for people with certain medical or age-related fertility factors. However, it’s also more involved and costly. The best choice depends on your personal circumstances.
Why choose Repromed for IUI or IVF?
Our dedicated team of fertility specialists in Auckland prides ourselves on delivering personalised, compassionate care. We know that everyone’s fertility journey is different, which is why we tailor our services to meet your unique needs.
With world-class technology, experienced specialists, and a supportive team by your side, Repromed is here to help you take the next step with confidence. Although our main clinic is located in Newmarket in Tāmaki Makaurau, we are proud to support clients from all around the country.
Ready to take the next step?
Choosing to start fertility treatment can feel like a big decision, but you don’t have to do it alone -our team is here to help. Repromed is the only clinic in Aotearoa New Zealand to offer a free 15-minute phone consultation with a fertility doctor, so book a call with us now to find the path that’s right for you.
