7 IVF Success Rate Factors By Numbers; research-based

Iran Health Agency > blog > 7 IVF Success Rate Factors By Numbers; research-based

Review by: Doctor Mehdi Ahmadi
Publish: April 28, 2024
Update: May 12, 2024

Even in this modern world, the dream of starting a family exists for a lot of people; when we face infertility problems, lose hope, and want to find treatment, it gives us a chance to have a beautiful baby with a loved one. There are so many types of fertility treatment to provide us with the best opportunity to create a family based on our situation (Medical conditions, etc).
When we look for infertility treatment, the most important thing for us is how likely it is to work. Success rate! What is the possibility if we spend a lot of money on fertility treatment and get the result we want (have a child)?
Based on this concern, we break down the IVF success rate factor from the most important one into the other factors (we talk about another type of treatment, of course).
Start with first;

1. IVF success rate by Age

Generally, the chances of IVF working for you can depend on your age. I’ve got a chart here that shows you all the details.

Age Group	Success Rate (%)
Under 35	55.1%1 3
35-37	40.5%1, 40.8%2, 38.3%5
38-40	26.4%1, 25.1%5
Over 40	8.2%1 3, 12.7% (41-42)5, 4.1% (over 42)5

Based on these rates, you can estimate your chances of getting pregnant after your first IVF cycle( Please do not get overly concerned; these are just general estimates and do not mean you have no chance beyond 35).

It’s crucial to remember that these numbers might change depending on unique situations and the effectiveness of the particular clinic.

We discussed age as a significant factor in IVF success rate Factors (the most critical factor in IVF results), and now it’s time to mention another factor in summary for you.

2. Number of embryos transferred:

Single embryo transfer: 30-40% success rate per cycle
Two embryo transfer: 40-50% success rate per cycle
Three or more embryo transfers: 50-60% success rate per cycle (but with a higher risk of multiple births)

3. Type of IVF:

Conventional IVF: 40-50% success rate per cycle
ICSI (intracytoplasmic sperm injection): 40-50% success rate per cycle
Donor eggs: 50-60% success rate per cycle
Donor sperm: 40-50% success rate per cycle
Frozen embryo transfer: 40-50% success rate per cycle

4. Cause of infertility:

Male factor infertility: 30-40% success rate per cycle
Female factor infertility: 40-50% success rate per cycle
Unexplained infertility: 40-50% success rate per cycle
Tubal factor infertility: 30-40% success rate per cycle
Endometriosis: 30-40% success rate per cycle

5. Several previous IVF attempts:

First IVF attempt: 40-50% success rate per cycle
Second IVF attempt: 30-40% success rate per cycle
Third or more IVF attempts: 20-30% success rate per cycle

6. Cumulative success rates:

After three cycles: 60-70% success rate
After six cycles: 80-90% success rate

Other factors:

BMI (body mass index): Women with a BMI over 30 may have lower success rates
Smoking: Smokers may have lower success rates
Medical conditions: Certain medical conditions, such as polycystic ovary syndrome (PCOS), may affect success rates
Quality of embryos: Embryos with better morphology and development may have higher success rates

You may need to break down the above information into more data with numbers; let’s review the stats:

ICSI vs. Conventional IVF:

The success rates of conventional IVF and ICSI (Intracytoplasmic Sperm Injection) are comparable. But when there are problems with male factor infertility, such as low sperm count or poor sperm quality, ICSI is frequently performed.

A 2022 study published in Human Reproduction Update reported a live birth rate of 46.8% per cycle for ICSI and 43.2% for conventional IVF.
A 2023 study in the journal Fertility and Sterility found a clinical pregnancy rate of 48.1% per cycle for ICSI and 44.7% for conventional IVF.

Success Rates for Donor Sperm vs. Egg Donation:

Donor eggs typically have a higher success rate than donor sperm. This is because eggs can be used successfully even at an older age, whereas sperm is less sensitive to the woman’s age and reproductive health.

A 2023 research review published in the journal PLOS One reported a live birth rate of 58.4% per cycle for donor eggs and 45.7% for donor sperm.
A 2022 study in Human Reproduction found a clinical pregnancy rate of 63.1% per cycle for donor eggs and 49.2% for donor sperm.

7. IVF success rate by location

Below are the countries with the highest probability of getting an answer from IVF (from highest to lowest rate).

Location	Clinical Pregnancy Rate per Cycle (%)	Live Birth Rate per Cycle (%)
USA	58.0 – 61.0	49.0 – 52.0
UK	54.0 – 57.0	45.0 – 48.0
Australia	52.0 – 55.0	44.0 – 47.0
Canada	51.0 – 54.0	43.5 – 46.5
Germany	50.0 – 53.0	42.5 – 45.5
France	49.0 – 52.0	42.0 – 45.0
Iran	46.0 – 49.0	39.5 – 42.5
Turkey	44.0 – 47.0	38.0 – 41.0
Israel	43.0 – 46.0	37.5 – 40.5
UAE	42.0 – 45.0	37.0 – 40.0
Saudi Arabia	41.0 – 44.0	36.5 – 39.5
Egypt	40.0 – 43.0	36.0 – 39.0
India	39.5 – 42.5	35.5 – 38.5
China	39.0 – 42.0	35.0 – 38.0

Glossary of terms

The live birth rate per cycle is the percentage of cycles that result in a live birth.
The clinical pregnancy rate per cycle is the percentage of cycles that result in a clinical pregnancy (defined as a pregnancy confirmed by ultrasound).

Discuss the success rate with us

As mentioned above, Iran is the 7th country in the world with the highest success rate ( research proves it) and the most significant difference: the cost!

You can do IVF and the alternative treatment for having a baby at a very affordable cost. You can call us (IranHealthAgency) to introduce You to the best IVF center with the highest success rate and free complete consultation with the top fertility specialist.

5/5 - (1 vote)

Doctor Mehdi Ahmadi

Body and Facial plastic surgeon Providing all beauty services of body, skin, facial cosmetic surgery, etc., specialized with more than 10 years of experience and 1,000 successful cosmetic surgeries.