Understanding Your Ovarian Reserve: What Every Woman Should Know

Your ovarian reserve refers to the number and quality of eggs remaining in your ovaries at any given time. It is one of the most important factors influencing your ability to conceive, whether naturally or through assisted reproduction. Unlike most cells in your body, eggs do not regenerate. You are born with every egg you will ever have, and that supply steadily decreases from before birth through menopause. Understanding your ovarian reserve can help you make better decisions about family planning, fertility treatment timing, and options like egg freezing.

This guide covers everything you need to know about your egg count, from how it changes over your lifetime to the medical tests that measure it and the steps you can take to protect your fertility.

How Many Eggs Do Women Have at Birth?

The story of your ovarian reserve begins long before you are born. Egg follicles start developing while you are still a fetus. At around 20 weeks of gestation, a female fetus carries a peak of roughly 7 million eggs. By the time a baby girl is born, that number has already dropped to about 2 million. During childhood, before puberty begins, the count falls further to between 300,000 and 500,000 eggs.

This natural decline is completely normal. The number of eggs present at puberty is typically more than sufficient for your entire reproductive life. However, your body will never produce new eggs. The supply you have at birth is all you will ever get, which is why ovarian reserve becomes such a critical factor as you age.

How Does Ovarian Reserve Change with Age?

Each month during your menstrual cycle, your ovaries release one mature egg. But that single egg is not the only one your body uses. During each cycle, a large group of follicles begin maturing simultaneously. Only one follicle is selected for ovulation, while the remaining follicles are reabsorbed and lost. This means a woman may lose 1,000 or more eggs per month, not just one. Over her reproductive lifetime, she will release approximately 500 viable eggs through ovulation.

Your ovarian reserve declines gradually between puberty and your mid-thirties, then drops off steeply. After age 35, many women experience a noticeable decline in both egg quantity and egg quality. According to reproductive health data from the American College of Obstetricians and Gynecologists (ACOG), fertility decreases significantly in the late thirties and early forties. By menopause, typically between ages 45 and 55, your ovarian reserve is effectively depleted.

What Is the Link Between Ovarian Reserve and Egg Quality?

Fertility depends not only on how many eggs you have but also on their quality. Eggs are among the oldest cells in a woman’s body, and over time they can accumulate DNA damage. This damage can affect fertilization, embryo development, and the risk of chromosomal abnormalities in a developing fetus.

A woman in her mid-twenties produces genetically normal embryos about 75% of the time. By her early forties, that figure drops to roughly 20%. This decline in egg quality is a major reason why pregnancy becomes harder with age, and why the risk of conditions such as Down syndrome increases for older mothers.

For women considering IVF or other assisted reproduction, egg quality directly affects success rates. The CDC’s national ART summary shows that IVF success rates decline sharply for women over 40 when using their own eggs, while donor egg cycles maintain higher success rates regardless of the recipient’s age.

How Can I Test My Ovarian Reserve?

If you are planning a pregnancy, experiencing fertility difficulties, or simply want to understand your reproductive timeline, testing your ovarian reserve can provide valuable information. Two main tests are used by fertility specialists to assess your egg count.

AMH Test (Anti-Müllerian Hormone)

AMH is a protein produced by the cells surrounding your egg follicles. A simple blood test measures the level of AMH in your bloodstream, giving your doctor an estimate of the number of eggs remaining in your ovaries. One of the advantages of the AMH test is that it can be performed at any point during your menstrual cycle. Normal AMH levels for women of reproductive age generally range from 1.0 to 3.5 ng/mL, though values vary by age and laboratory. A low AMH result suggests a diminished ovarian reserve and may prompt your doctor to recommend earlier intervention.

Antral Follicle Count (AFC)

An antral follicle count is a transvaginal ultrasound performed at the beginning of your menstrual cycle. It allows a fertility specialist to visually count the small, resting follicles in both ovaries. This test provides data on both the total number of eggs remaining and the likely response to ovarian stimulation during fertility treatment. A count of 10 to 20 antral follicles is generally considered normal, while fewer than 6 may indicate diminished ovarian reserve.

Together, AMH testing and antral follicle counts give a reliable picture of your current ovarian reserve. These results can help you and your doctor decide on the best next steps, whether that means trying to conceive naturally, starting treatment, or considering egg freezing.

Can Fertility Drugs Increase My Ovarian Reserve?

No drug, supplement, or treatment can create new eggs or increase the total number stored in your ovaries. Your ovarian reserve is fixed from birth. However, fertility medications like gonadotropins can stimulate your ovaries to mature multiple follicles during a single cycle instead of just one. This allows fertility specialists to retrieve several eggs at once for use in IVF or for egg freezing.

In effect, these drugs make better use of the eggs you already have. Rather than losing the extra follicles that would normally be reabsorbed each month, fertility medication rescues them and brings them to maturity. This can be especially helpful for women with a diminished ovarian reserve or those over 35 who want to maximize their remaining fertility.

Egg Freezing: Preserving Your Ovarian Reserve

Egg freezing, or oocyte cryopreservation, allows women to store their eggs at a younger age for future use. Since egg quality declines significantly after 35, freezing eggs in your late twenties or early thirties gives you the best chance of having high-quality eggs available later. A single egg freezing cycle typically costs between $6,000 and $10,000 in the United States, with annual storage fees of $500 to $1,000.

This technology is particularly valuable for women who are not yet ready to start a family, those who want time to find the right sperm donor or co-parent, or those facing medical treatments like chemotherapy that could damage their ovarian reserve. Platforms like CoParents.com, a co-parenting and sperm donation network with over 150,000 users since 2008, help women connect with donors when they are ready to use their frozen eggs.

Can Lifestyle Choices Protect Your Ovarian Reserve?

While no lifestyle change can add to the number of eggs in your ovaries or stop the natural decline of ovarian reserve with age, healthy habits can help protect the quality of the eggs you have. Research consistently shows that certain behaviors support better reproductive outcomes.

Avoiding smoking is one of the most impactful choices you can make. Cigarette smoke accelerates egg loss and can bring menopause forward by several years. Limiting alcohol consumption, maintaining a healthy weight, and eating a balanced diet rich in antioxidants all contribute to healthier egg development. Stress management also plays a role: high levels of cortisol, the stress hormone, can interfere with ovulation by signalling to the brain that conditions are not safe for reproduction. Techniques like mindfulness, meditation, regular exercise and adequate sleep can help keep your hormonal balance on track and support your remaining ovarian reserve.

FAQ

What is a normal ovarian reserve for my age?

Ovarian reserve varies widely between individuals. As a general guide, women under 35 typically have an AMH level above 1.0 ng/mL and an antral follicle count of 10 or more. After 35, both measures tend to decline. After 40, AMH levels below 1.0 ng/mL are common. However, these are averages, and a fertility specialist can interpret your specific results in the context of your overall health and goals.

Can I get pregnant with a low ovarian reserve?

Yes, pregnancy is still possible with a diminished ovarian reserve, though it may be more difficult. Your doctor may recommend assisted reproduction methods like IVF to maximize your chances. In some cases, using donor eggs from a younger woman can significantly improve success rates.

At what age should I test my ovarian reserve?

If you plan to delay pregnancy past your early thirties, consider testing your ovarian reserve around age 30 to establish a baseline. If you have risk factors for early ovarian decline, such as a family history of early menopause, previous ovarian surgery, or endometriosis, earlier testing may be appropriate. Talk to your doctor about the right timing for your situation.

Does the pill affect my ovarian reserve?

Hormonal contraception does not deplete your ovarian reserve faster than normal. While the pill suppresses ovulation, the natural monthly loss of unused follicles continues in the background. After stopping the pill, your ovarian reserve will be similar to what it would have been without it, adjusted for your age.

How does ovarian reserve affect IVF success?

Women with a higher ovarian reserve generally produce more eggs during an IVF stimulation cycle, which gives fertility specialists more embryos to work with and improves the chances of a successful pregnancy. A diminished ovarian reserve may mean fewer eggs are retrieved, but quality matters as much as quantity. Preimplantation genetic testing can help identify the healthiest embryos for transfer, even when egg numbers are low.