Diminished Ovarian Reserve and Fertility
Diminished ovarian reserve (DOR) occurs when the ovaries have fewer eggs than expected for a woman’s age, which can affect the ability to get pregnant. DOR may develop due to aging, certain medical treatments or genetics. If you’ve been diagnosed with DOR and want to become pregnant, University Hospitals offers personalized care and a range of treatment option to help support your fertility goals.
Schedule a Fertility Consultation
A fertility consultation can help you better understand your options for getting pregnant with a DOR diagnosis.
To schedule a consultation with a University Hospitals Fertility Center expert, call 216-765-3352.
Quick Facts
- Diminished ovarian reserve (DOR) occurs when there are fewer or lower quality eggs than expected in the ovaries.
- DOR is most commonly age-related, but may also be caused by genetics, medical treatments or surgery.
- Many women do not have symptoms and learn about DOR through fertility testing.
- DOR does not always prevent pregnancy, but it may affect response to fertility treatment.
- Fertility options may include monitoring, in vitro fertilization (IVF) or the use of donor eggs, depending on individual factors.
- During a fertility evaluation, you and your fertility specialist can develop a personalized care plan for DOR.
What Is Diminished Ovarian Reserve?
Ovarian reserve refers to the number and quality of eggs in the ovaries. As a woman ages, both the quantity and quality of eggs naturally decline. It’s a natural process that happens to all women over time, but DOR can sometimes occur earlier than expected. This may be due to age, certain medical treatments (such as chemotherapy or radiation), genetics, autoimmune conditions or other factors.
DOR means the ovaries have fewer eggs or lower-quality eggs than expected for your age, which reduces the chance of becoming pregnant. Some women discover they have DOR when seeking fertility evaluation; others may be diagnosed after unsuccessful fertility treatments.
DOR doesn’t mean you cannot become pregnant. It means your fertility options and timeline may be different, and treatment strategies may need to be personalized based on your individual situation. Your fertility specialist can help you understand what DOR means for you specifically and explain the treatment options available.
What Causes Diminished Ovarian Reserve?
DOR may be caused by several factors, though sometimes no clear cause is identified. Understanding what may have contributed to DOR can help you and your fertility specialist plan next steps.
- Age-Related Decline
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Age is the primary cause of DOR, and age-related DOR is a normal part of reproductive aging. Women are born with all the eggs they will ever have. As they get older, the number of eggs in their ovaries naturally decreases, and the quality of remaining eggs declines. This process accelerates after age 35.
- Genetic Factors
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Some women are born with fewer eggs due to genetics or inherited conditions that affect ovarian function. Chromosomal abnormalities or genetic mutations within the eggs can also influence fertility. If you have a family history of early menopause or infertility, genetic factors may play a role.
- Medical Treatments
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Certain medical treatments can damage or reduce egg supply. For example, chemotherapy and radiation therapy, especially when given to the pelvis or abdomen, can harm ovarian tissue. Some surgeries or medications used to treat other conditions may also affect ovarian reserve.
- Ovarian Surgery or Injury
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Ovarian cysts, endometriosis or other conditions that require ovarian surgery can require the removal of ovarian tissue and potentially reduce egg supply. Injury or trauma to the ovaries, such as ovarian torsion, can also impact ovarian reserve and fertility.
- Lifestyle Factors
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Certain lifestyle factors, such as smoking, accelerates ovarian aging and can reduce ovarian reserve. Other factors that can influence reproductive health include poor nutrition, extreme stress and certain environmental exposures.
- Idiopathic DOR (No Known Cause)
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Sometimes no clear cause for DOR can be identified. This is called idiopathic DOR, which means the reason for reduced ovarian reserve is unknown.
- Can Diminished Ovarian Reserve Be Reversed?
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Ovarian aging cannot be reversed. Ovaries do not produce new eggs throughout life, so once eggs are lost, they cannot be regenerated. However, treatment focuses on managing your fertility options and maximizing your chances of conception with the eggs you have.
How is Diminished Ovarian Reserve Diagnosed?
Early evaluation and diagnosis of DOR is important because it allows you and your fertility specialist to explore options sooner. The sooner you seek evaluation if you’re concerned about fertility, the more options may be available to you.
DOR is diagnosed through a combination of hormone testing and ultrasound imaging. Your fertility specialist uses these tests together to get a complete picture of your ovarian reserve and potential to become pregnant.
Hormone Testing
Blood tests measure certain hormones that reflect ovarian function. An important test is for the hormone AMH (anti-Müllerian hormone), which is produced by the cells surrounding eggs in the ovaries and provides a direct measure of the number of eggs available. FSH (follicle-stimulating hormone) and estradiol levels are also measured; higher FSH levels can indicate lower ovarian reserve because the pituitary gland is working harder to stimulate fewer eggs. FSH levels are typically measured on specific days of your menstrual cycle for accuracy.
Ultrasound Imaging
A transvaginal ultrasound is used to visualize your ovaries and count the antral follicles – small, fluid-filled sacs that contain eggs. The antral follicle count provides information about the number of eggs available in a given cycle. Ultrasound imaging also allows your specialist to assess ovarian size and appearance, which can impact ovarian reserve.
A Full Fertility Evaluation
Hormone test results and ultrasound findings are not interpreted by themselves – they are evaluated as part of a full fertility evaluation which includes your age, medical history and fertility goals. DOR is diagnosed based on a combination of these factors. Your fertility specialist will review all the information to confirm DOR and discuss what it means for your individual situation and fertility options.
Can You Get Pregnant with Diminished Ovarian Reserve?
Yes, pregnancy is still possible with DOR. Many women with reduced ovarian reserve become pregnant through natural conception, fertility medications, IVF or other assisted reproductive techniques. Your chance of becoming pregnant depends on several factors, including the quality of your remaining eggs, your age, your partner’s fertility (if applicable) and other health factors.
The key is that DOR changes your fertility timeline and options – it doesn’t necessarily eliminate the possibility of pregnancy. With earlier evaluation and appropriate treatment, many women with DOR are able to conceive. Your fertility specialist can discuss realistic expectations based on your specific situation.
Treatment Options for Diminished Ovarian Reserve
Treatment for DOR depends on your fertility goals, age, test results and individual situation. A consultation can help determine how DOR may affect your fertility and what options may be appropriate.
- Monitoring and Timed Intercourse
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For some women with early-stage DOR who are trying to conceive naturally, careful monitoring and timed intercourse may be recommended. This involves tracking ovulation through ultrasound and blood tests to optimize timing for intercourse. This approach works best for women in their late 30s or early 40s who don’t have other fertility conditions.
- Ovulation Induction
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Fertility medications can stimulate the ovaries to develop and release eggs. Ovulation induction may be used alone or combined with intrauterine insemination (IUI) to improve chances of conception. With DOR, ovarian response to medications may vary, so close monitoring is important.
- In Vitro Fertilization
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In IVF, the ovaries are stimulated with medications to produce eggs, which are retrieved through a minor medical procedure, fertilized in the lab, then transferred to the uterus. For women with DOR, IVF may make existing, high-quality eggs available for fertilization. With DOR your response to ovarian stimulation may be different than typical IVF patients, and your care team will adjust protocols based on your individual response.
- Fertility Preservation
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If you have DOR and are not ready to pursue pregnancy immediately, egg freezing or embryo freezing may be options to preserve your fertility. Egg or embryo freezing is often more effective when done earlier, since egg quality declines further with age.
- Donor Eggs
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Schedule a Fertility Consultation
A fertility consultation can help you better understand your options for getting pregnant with a DOR diagnosis.
To schedule a consultation with a University Hospitals Fertility Center expert, call 216-765-3352.
What to Expect After a Diminished Ovarian Reserve Diagnosis
A DOR diagnosis can bring mixed emotions. It can be a relief to have an explanation for your condition, but also concerning about what it means for your fertility. These feelings are valid and normal.
The important thing to remember is that DOR is not a diagnosis of infertility. It means your fertility is different from the general population, and your treatment plan needs to be individualized. Many women with DOR become pregnant and have healthy babies.
After diagnosis, you'll work with your fertility specialist to understand your specific situation, discuss treatment options and create a personalized plan. The timeline for fertility treatment will depend on your age, test results, fertility goals and personal preferences. Earlier evaluation and treatment may expand your options, so it’s important to have timely conversations if you’re considering pregnancy.
Diminished Ovarian Reserve and Fertility Planning
DOR influences how you approach fertility planning and what treatment options may be most appropriate for you. The sooner you’re aware of DOR, the sooner you can discuss options with a fertility specialist and make informed decisions about your path forward.
Earlier fertility planning when DOR is identified may expand your options. For example, egg freezing may be more effective when it is done earlier rather than waiting. Similarly, pursuing IVF sooner rather than later may result in a better response to stimulation and more eggs being available for retrieval.
With your fertility specialist, you can weigh the benefits and timing of different approaches – whether that’s natural conception with monitoring, fertility medications, IVF, egg freezing or another path – and create a plan that aligns with your situation and goals.
Specialized Care for the LGBTQ+ Community
University Hospitals offers compassionate, collaborative care for the LGBTQ+ community, including fertility and reproductive health services for LGBTQ+ individuals and same-sex couples.
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Frequently Asked Questions About DOR
- What causes diminished ovarian reserve?
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DOR may be caused by several factors. Age is the primary cause. Egg quantity and quality naturally decline over time, accelerating after age 35. Other causes include genetic factors (being born with fewer eggs or inheriting conditions affecting ovarian function), medical treatments such as chemotherapy or radiation, ovarian surgery or injury, smoking, and other lifestyle factors. Sometimes no clear cause is identified, which is called idiopathic DOR.
- Is pregnancy possible with diminished ovarian reserve?
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Yes, pregnancy is still possible with DOR. Many women with reduced ovarian reserve become pregnant through natural conception, fertility medications, IVF or other assisted reproductive treatments. Whether you can become pregnant depends on factors including the quality of your remaining eggs, your age, your partner’s fertility and other health factors. DOR changes your fertility options and timeline, but it doesn’t necessarily eliminate the possibility of pregnancy. Your fertility specialist can discuss realistic expectations based on your specific situation.
- What treatments are available for diminished ovarian reserve?
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Treatment options for DOR depend on your age, fertility goals and individual situation. Options include monitoring and timed intercourse for natural conception, ovulation induction medications to stimulate the ovaries, in vitro fertilization (IVF) to retrieve and fertilize available eggs, fertility preservation through egg or embryo freezing, and donor egg IVF if egg quality is low. Your fertility specialist will recommend an approach tailored to your situation and discuss which option or combination of options may work best for you.
- Does diminished ovarian reserve increase miscarriage risk?
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DOR involves both reduced egg quantity and quality. Lower egg quality increases the risk of chromosomal abnormalities in embryos, which can result in miscarriage or pregnancy loss. This is why age-related DOR becomes more significant as women get older – both egg quantity and quality decline, affecting pregnancy success rates. However, many women with DOR do have successful pregnancies. Your fertility specialist can discuss your individual risk factors and options to support a healthy pregnancy.
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The Path to Parenthood: Support for Your Fertility Journey
Related Resources and Next Steps
Your fertility care may involve additional treatments and services. Explore these resources to understand your full range of care options.
- Ovulation Induction: Fertility medications may support ovulation if you have DOR. Learn about ovulation induction and how it works.
- In Vitro Fertilization (IVF): IVF may help retrieve and fertilize available eggs. Learn about IVF and how it works.
- Fertility Center Hub: Access all fertility services and resources at UH.
Schedule a Fertility Consultation
Understanding your DOR diagnosis and exploring treatment options is an important step in your fertility journey. University Hospitals provides comprehensive fertility care with experienced reproductive endocrinologists who can evaluate your individual situation and help you create a personalized treatment plan.
Ready to discuss diminished ovarian reserve and your fertility options?
To schedule a consultation, call 216-765-3352.