Trying to Conceive After 40: What to Realistically Expect

Trying to conceive after 40 is more common than ever, but it comes with its own set of challenges and considerations. Age affects both egg quality and egg quantity, yet many people over 40 still go on to have successful pregnancies — whether naturally or with the help of assisted reproductive technology. Here’s a realistic look at what the fertility journey after 40 actually involves.

How Age Affects Fertility

Women are born with all the eggs they will ever have, and that number only goes down from there. As you get older:

• Egg quantity declines, with the drop-off becoming more noticeable after 35 and more pronounced after 40.
• Egg quality declines too, which raises the risk of chromosomal abnormalities in resulting embryos.
• Menstrual cycles may become more irregular, making it harder to predict ovulation.

None of this means pregnancy is impossible after 40. It does mean fewer eggs to work with, lower odds of conceiving naturally each cycle, and a higher risk of miscarriage compared with your 20s and early 30s.

Natural Conception After 40

Conceiving naturally after 40 is still very possible, especially in the earlier part of the decade — but timing matters more than it once did. If you’ve been trying for six months or more without success, it’s a good idea to seek a fertility evaluation rather than waiting the traditional twelve months. Because fertility declines every year after 35, getting an early read on your numbers simply preserves more options down the line.

Testing to Expect

A typical fertility workup for someone over 40 usually includes:

• AMH (Anti-Müllerian Hormone): a blood test that estimates ovarian reserve, or roughly how many eggs remain.
• FSH and estradiol: hormone levels that help assess how hard the body is working to stimulate egg development.
• Antral follicle count (ultrasound): a scan that estimates the number of follicles capable of developing that cycle.
• Semen analysis for your partner, since male fertility factors are involved in roughly half of all infertility cases and are worth ruling in or out early.

When IVF Becomes the Recommended Path

Because time is such a significant factor after 40, many fertility providers recommend moving to IVF sooner rather than spending months on less time-sensitive approaches. IVF allows for controlled ovarian stimulation to retrieve multiple eggs in a single cycle, embryo creation with the option of genetic testing (PGT-A), and more precise timing of embryo transfer — all of which can help make the most of a more limited egg supply.

IVF Success Rates Over 40

Success rates vary by clinic and by individual circumstances, but CDC and SART data consistently show a similar downward pattern using a woman’s own eggs:

• Age 40: roughly 20–25% live birth rate per cycle
• Age 42: roughly 10–15%
• Age 44 and beyond: generally under 5%

Because of this steep decline, many clinics begin discussing donor eggs as an option somewhere around age 43, since live birth rates with donor eggs tend to stay in the 45–55% range regardless of the recipient’s age — a reflection of the donor’s egg quality rather than the recipient’s own reproductive age.

Why Egg Quality Is the Real Barrier

Egg quantity gets a lot of attention, but egg quality is generally the bigger obstacle after 40. Older eggs are more likely to carry chromosomal abnormalities, which can interfere with fertilization and make it harder for an embryo to implant successfully — and it’s also the main driver behind the higher miscarriage rates seen at this age. This is where PGT-A (preimplantation genetic testing for aneuploidy) comes in: by screening embryos for chromosomal normalcy before transfer, it can help improve success rates per transfer and lower the risk of miscarriage, particularly for women using IVF later in their reproductive years.

Practical Tips for TTC Over 40

• Get a full fertility workup sooner rather than later. Early information means more options, not fewer.
• Don’t wait too long before considering IVF, given how time-sensitive fertility becomes after 40.
• Consider egg or embryo freezing if you know you want to delay pregnancy further.
• Prioritize the fundamentals — nutrition, exercise, sleep, and stress management all support overall reproductive health, even if they can’t reverse egg quality decline.
• Talk to your doctor about fertility-supportive supplements, such as CoQ10 or a prenatal with methylated folate, which some research links to better egg and embryo quality outcomes.

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Sources

1. Fertility Clinic Finder — IVF After 40: Success Rates, Options, and What to Expect
2. Cofertility — IVF Success Rates by Age
3. LIV Hospital — IVF at 42: What Are Your Real Chances? Key Facts
4. Life IVF Center — IVF Success Rates by Age: What the Data Shows

This article is for informational purposes only and is not a substitute for professional medical advice. Success rates and recommendations vary by clinic and individual health history — talk to a reproductive endocrinologist for guidance specific to you.