In recent years, women have increasingly postponed their first childbirth until later in life. As a result, the average age of first-time mothers has risen from 24.6 during the 1970s to 28. Additionally, some women wait even longer, and birth rates for women in their 30s are at an all-time high.

As women age, their fertility declines and this decline becomes more significant after 35 years of age. Women are born with a finite number of eggs, and as they age, the quality and quantity of these eggs decrease, making it more challenging for embryos to implant and lead to a successful pregnancy. Consequently, IVF success rates decrease with age.

It’s important to note that the success rate of IVF isn’t solely dependent on age. Other factors such as the woman’s medical history and the quality of the sperm and embryos used in the procedure can also impact the success rate.

Women Under 35 Years

According to research conducted by the Centers for Disease Control (CDC), women under 35, particularly those in their 20s, have a greater chance of conceiving successfully because this is when they are most fertile. Women without fertility issues have a 20% chance of conceiving naturally. However, if a woman is experiencing Infertility due to factors such as a low number of eggs, genetic disorders, and male Infertility, they should consider IVF treatment. The IVF success rates under 35 are encouraging and offer hope to couples struggling with Infertility.

Women 40 years and Above

Women over 40 face significant difficulty in achieving natural conception, with the pregnancy rate for intrauterine insemination (IUI) being almost nil. As a result, IVF is a viable option for women above 40 who want to get pregnant because it offers a higher chance of success than natural conception or other fertility treatments.

With age egg quality and quantity in a woman decrease, making natural conception more challenging. IVF involves fertilizing the eggs outside the body, bypassing the need for high-quality eggs and increasing the chances of successful fertilization. Moreover, IVF can be a powerful tool for detecting chromosomal abnormalities and increasing the chances of a successful pregnancy through preimplantation genetic testing (PGT).

At 40, the likelihood of success with a single round of IVF cycle to achieve pregnancy decreases. Thus, it is advisable to consider multiple rounds of treatment to increase the chances of success. There are, however, various factors unique to each person’s body and circumstances that may alter these statistics.

Nevertheless, it is crucial to recognize that despite the challenges, women in this age group may still have the potential to conceive through IVF, particularly if they have access to exceptional medical care and support.

Freezing eggs at an early age is a common way to achieve pregnancy at any age. While the procedure may not be appropriate for everyone, it can be a valuable option for women who want to preserve their fertility for the future. It is important to discuss the benefits and risks of egg freezing with a qualified fertility specialist to determine if it is the right choice for you.


While age is essential in IVF success rates, it is important to remember that every individual’s experience is unique. Factors such as overall health, medical history, and the quality of sperm and embryos used can also impact the success rate of the procedure. Additionally, advances in medical technology and techniques may improve IVF success rates in the future, making it possible for more couples to conceive and start families.


Q: What is the IVF success rate under 35?

A: The success rate of IVF for women under 35 years old is typically around 30-40% per cycle, depending on various factors such as the woman’s overall health, the quality of the embryos, and the fertility clinic’s success rates.

Q: What is the success rate of IVF for women between 35-40 years old?

A: The success rate of IVF for women between 35-40 years old decreases to around 20-30% per cycle due to a decrease in fertility and egg quality as women age.

Q: Is it possible for women over 40 to have a successful IVF treatment?

A: Yes, women over 40 can have a successful IVF treatment, nevertheless the success rate might decrease significantly with age.

Q: Can lifestyle factors affect the success rate of IVF?

A: Yes, lifestyle factors such as smoking, excessive alcohol consumption, and being overweight or underweight can have a negative impact on the success rate of IVF. Maintaining a healthy lifestyle can increase the chances of a successful IVF treatment.

Q: What are IVF pregnancy rates by age?

A: IVF pregnancy rates vary based on a woman’s age. Generally, younger women tend to have higher success rates compared to older women.

Q: Is IVF pregnancy rates by age the only factor affecting IVF success?

A: Age is a critical factor, but other variables, such as the cause of infertility, the quality of eggs/sperm, and the clinic’s expertise, also influence IVF success.