IVF After 40: Understanding Your Chances with Late Motherhood

In short: The chance of success with IVF falls gradually after 40 because the number and quality of eggs decline and the ovaries respond less to medication, but many women still achieve a pregnancy, especially with a good ovarian reserve: at our centre the clinical pregnancy rate for women aged 40 and over is 40%. Chromosome testing of embryos helps to choose healthy embryos and reduce miscarriage. The main advice is not to delay seeing the doctor.

Getting married later in life or choosing to delay starting a family has become increasingly common today, whether for social, professional, or personal reasons. As women age, some couples may find it harder to conceive naturally, which is why assisted reproductive technologies like in-vitro fertilization (IVF) can become an important and hopeful option on the path to pregnancy.

How Age Affects Fertility

A woman’s fertility naturally declines with age, and this decline becomes more noticeable after age 40. This happens for a few key reasons:

• A decrease in the number of eggs remaining in the ovaries
• A decline in egg quality, with a higher likelihood of chromosomal abnormalities
• A reduced response of the ovaries to fertility medications

Together, these changes can lower the chances of natural conception and may also affect outcomes with in-vitro fertilization (IVF).

Is IVF After 40 Possible?

Even with these challenges, pregnancy after 40 is still possible with the help of assisted reproductive technologies. Every woman’s situation is different, and outcomes depend on several personal factors, including:

• The woman’s exact age
• Ovarian reserve and the number of available follicles
• Sperm quality
• The presence of other conditions, such as endometriosis or uterine issues

In general, IVF outcomes tend to become more challenging after age 40 compared to younger ages.

As a general guide from international registries, the chance of a baby per IVF cycle using a woman’s own eggs is roughly 10–15% at ages 40–42, and falls to below about 5% after age 43, which is why timing matters. At our centre, the clinical pregnancy rate per embryo transfer for women aged 40 and over is 40%. That said, many women in this age group do go on to achieve pregnancy, particularly when ovarian reserve is favorable — which is why a personal, in-depth evaluation matters so much.

Why a Pre-Treatment Assessment Matters

Before starting any fertility treatment, a thorough evaluation is recommended so your doctor can better understand your unique situation. This usually includes:

• An ultrasound examination to assess the antral follicle count, often together with an AMH blood test to estimate ovarian reserve
• Evaluation of the uterus and its lining
• Semen analysis for the male partner
• Relevant laboratory tests

This assessment allows your doctor to design a treatment plan tailored to you and to discuss realistic expectations together, as a couple.

The Role of Preimplantation Genetic Testing (PGT)

As a woman’s age increases, the likelihood of chromosomal abnormalities in embryos also rises. For this reason, genetic testing of embryos for chromosome number (PGT-A) may be discussed with some couples; it is not recommended routinely by ESHRE (2023), and its benefits and limits should be weighed carefully. This can help:

• Identify chromosomally healthy embryos
• Lower the risk of miscarriage
• Reduce the number of transfers needed and the time to pregnancy — although studies show it does not increase the overall chance of having a baby from a treatment cycle, and some women may end with no embryo suitable for transfer

Helpful Tips to Support Your Fertility Journey

• Don’t wait too long to speak with a fertility specialist if you’re having trouble conceiving.
• Maintain a healthy weight and a balanced, active lifestyle.
• Avoid smoking.
• Follow your doctor’s guidance closely throughout treatment.

While fertility does decline with age, ongoing advances in assisted reproductive technology have opened the door to pregnancy for many women over 40. An early, thorough assessment and a treatment plan tailored to your specific needs can make a meaningful difference in your journey. If you have questions about your fertility options after 40, the team at Dr. Najeeb Layyous’s clinic is here to guide you with a personalized evaluation and compassionate care.

Dr Najeeb Layyous F.R.C.O.G

Consultant Obstetrician, Gynecologist and Infertility Specialist