Clearing the Doubts! How Successful Are IUI, IVF, and ICSI?
- Siam Fertility Clinic
- 7 days ago
- 3 min read

Today, there are various fertility treatment options available, including IUI (Intrauterine Insemination), IVF (In Vitro Fertilization )and ICSI (Intracytoplasmic Sperm Injection) . Each method has different success rates, depending on several factors such as the woman’s age, sperm quality, and uterine health. In this article, we’ll analyze how likely each method is to succeed and explore the key factors that influence the outcome of fertility treatments. Let’s take a closer look!
Understanding the differences in success rates between fertility treatments can help you make informed decisions. Here’s a breakdown of each method:
IUI (Intrauterine Insemination)
IUI is a suitable treatment for couples who still have relatively healthy reproductive systems—for example, when the woman’s fallopian tubes are functional and the man’s sperm count is within a normal range. In this method, selected healthy sperm are inserted directly into the uterus during ovulation to enhance the chances of pregnancy.
Success rate: Around 10–20% per cycle, depending on age and overall health.
Why it's popular: IUI is simple, less invasive, and more affordable compared to other methods. Helpful tip: If both partners are under 35 and reproductive health is in good condition, IUI may be an ideal starting point. However, if you’re over 35 or have additional complications, consult a specialist to explore more advanced options.
IVF (In Vitro Fertilization)
IVF, or "test tube baby," involves combining eggs and sperm in a laboratory. Once fertilization occurs and embryos develop, they are transferred back into the uterus. IVF is ideal for complex cases, such as damaged fallopian tubes or severely low sperm count, and for couples who haven't had success with IUI.
Success rate: Around 40% –50% per cycle, depending on age and overall health.
Helpful tip: IVF is recommended when you're aiming for a higher success rate, especially in complicated or previously unsuccessful cases. IVF may involve higher costs, but at Siam Fertility Clinic ensures that you will get close monitoring and a high standard of care.
ICSI (Intracytoplasmic Sperm Injection)
ICSI is a more advanced method, particularly beneficial for couples dealing with male infertility issues such as low sperm count, weak motility, or previous failed IUI attempts. A single, healthy sperm is directly injected into the woman’s egg to maximize fertilization success.
Success rate: Approximately 50–60% per cycle, depending on the woman’s age and egg health.
Helpful tip: If male factor infertility is present or previous treatments haven’t worked, ICSI could be the most suitable and effective solution. Always consult a fertility specialist to thoroughly assess your situation.
Choosing the right fertility treatment shouldn’t be done alone. It’s crucial to consult with a specialist who understands your health, goals, and limitations. Here are some initial considerations:
Age and Egg Reserve: Women under 35 with healthy reproductive organs may start with IUI. For those over 35, ICSI or IVF may be more effective.
Sperm Quality: If the male partner has a low sperm count or poor sperm quality, ICSI offers better success.
Uterine and Tubal Health: For issues like blocked or damaged fallopian tubes, IVF is ideal, as it bypasses the need for natural fertilization through the tubes.
Previous Treatment History: If IUI or IVF attempts have failed, ICSI might provide a higher chance of success.
In summary, IUI, IVF, and ICSI are all viable fertility treatments, each with different success rates and recommended use cases. Choosing the right method depends on personal health factors and past fertility challenges.
At Siam Fertility Clinic, we’re more than just a clinic—we’re your trusted partner in your journey to parenthood. Our team of experienced fertility specialists uses the most advanced medical technologies and offers personalized care throughout your treatment. We conduct in-depth diagnostics and assessments to create a treatment plan tailored specifically for you.
Our clean, modern, and internationally accredited laboratory—certified by the Reproductive Technology Accreditation Committee (RTAC) under The Fertility Society of Australia—ensures the highest standards in assisted reproductive technology.