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What are the success rates of IVF treatment?
IVF Treatment is one of the assisted reproductive methods with the highest success rates for couples who are unable to achieve pregnancy naturally. Research shows that the cumulative live birth rate can reach 67.9% over up to 6 cycles [1].
The prospective mother’s ovaries are stimulated with hormone injections; the resulting eggs are retrieved, the highest-quality ones are combined with sperm obtained from the prospective father, and the resulting embryos are transferred to the prospective mother’s uterus. Before IVF treatment, it is extremely important to establish the correct diagnosis and determine the right treatment method. In this way, the physician can express the success rates for the couple in a realistic manner [2].
“ ”The success rate in IVF is different for every couple. The most appropriate approach is to create a personalized treatment plan by taking factors such as age, ovarian reserve, sperm quality, and lifestyle into account.
Is the Success Rate High in IVF Treatment?
The success rate in IVF treatment is among the highest of all assisted reproductive techniques. According to CDC and SART data, the live birth rates by age are as follows [2, 3]:
- Under age 35: Cumulative live birth rate ~51.1%
- Ages 35–37: ~38.6%
- Ages 38–40: ~24.8%
- Ages 41–42: ~12.8%
- Over age 42: ~3.9% (with own eggs)
With multiple cycles, these rates increase significantly: while the live birth rate is 33% in the first cycle, it can reach 56.9% over 3 cycles and 67.9% over 6 cycles [1].
However, success rates are determined by many different factors. In particular, factors such as the age of the prospective mother, the quality of the reproductive cells, the underlying cause of infertility, and adherence to treatment directly affect the chance of success [3].
For detailed information about IVF treatment methods, you can review our page on what are IVF treatment methods.
Factors That Determine the Success Rate
The main factors affecting the success rate are as follows [2, 3, 4]:
- Age of the prospective mother: After age 35, the chance of success decreases because ovarian reserve declines. The decrease in egg quality negatively affects implantation success, especially by increasing the rate of aneuploid embryos.
- Ovarian reserve (AMH and antral follicle count): A higher reserve makes it possible to obtain more eggs and therefore allows for better embryo selection. In low reserve cases, the cumulative live birth rate may decline to as low as 29.4% [1].
- Sperm quality: The age of the prospective father and sperm parameters directly affect success. Sperm DNA fragmentation may reduce implantation success [3].
- Body mass index (BMI) and weight: Reaching a healthy weight before treatment increases the chance of success in overweight prospective mothers.
- Smoking and alcohol: Smoking negatively affects egg quality and IVF success; smoking and alcohol should be stopped completely before treatment.
- Experience of the center: The physician’s experience, embryo culture quality, and laboratory standards also play a decisive role.
For detailed information about the risks of IVF treatment, you can review our page on whether IVF treatment has risks.
Frequently Asked Questions (FAQ)
What is the success rate in IVF?
While the live birth rate in a single cycle is on average 33%, this rate can rise to approximately 57% over 3 cycles and up to approximately 68% over 6 cycles. In women under age 35, the cumulative rate may approach 70%. Each couple’s individual factors significantly affect this rate.
Can IVF be successful after age 40?
Yes, it is possible; however, the success rate decreases significantly. Between ages 41 and 42, the live birth rate is approximately 12.8%, while over age 42 it is approximately 3.9% with one’s own eggs. In this group, the option of donor eggs may significantly increase the success rate.
How many IVF attempts may be needed?
Most couples achieve pregnancy within 2–3 cycles. However, each unsuccessful cycle provides valuable information and contributes to improving the protocol. Research shows that continuing up to 6 cycles increases cumulative success.
Does smoking affect IVF success?
Yes, significantly. Smoking negatively affects egg quality and ovarian reserve, reduces IVF success, and increases the risk of miscarriage. ASRM strongly recommends quitting smoking completely before IVF.
Does losing weight increase IVF success?
Yes. In overweight patients, reaching a healthy BMI before treatment improves hormonal response, increases egg quality, and reduces the risk of pregnancy complications. Therefore, weight management before treatment is considered an important preparatory step.
References
- Mouanness, M., et al. (2020). Cumulative Live-Birth Rates by Maternal Age after One or Multiple In Vitro Fertilization Cycles. PMC7139227. (https://pmc.ncbi.nlm.nih.gov/articles/PMC7139227/)
- Xu, T., et al. (2022). Informative predictors of pregnancy after first IVF cycle. Scientific Reports, 12, 839. PMC8763861. (https://pmc.ncbi.nlm.nih.gov/articles/PMC8763861/)
- Centers for Disease Control and Prevention (CDC). ART IVF Success Estimator. (https://www.cdc.gov/art/ivf-success-estimator/index.html)
- American Society for Reproductive Medicine (ASRM). In Vitro Fertilization Treatment Journey. ReproductiveFacts.org. (https://www.reproductivefacts.org/patient-journeys/in-vitro-fertilization-treatment/)