Ovarian reserve is one of the important indicators used to assess a woman's reproductive health, particularly when planning a pregnancy or preparing for fertility treatment. One of the main tests used for this purpose is the Ovarian Reserve Test, which measures anti-Müllerian hormone (AMH) levels in the blood. This test helps provide an approximate idea of the remaining egg supply in the ovaries. However, it does not measure egg quality and cannot independently determine the chances of natural pregnancy.
A doctor may recommend an AMH test in cases of difficulty conceiving, before certain assisted reproductive procedures, or when a low ovarian reserve or polycystic ovary syndrome (PCOS) is suspected. The result's meaning depends on age, medical history, symptoms, and other test findings. Therefore, it should not be interpreted in isolation from a medical assessment.
In this article, we discuss why the test is requested, when to take an AMH test, normal AMH levels, what high and low results may mean, the difference between AMH and FSH tests, and the main instructions to follow before testing.
Why Does a Doctor Recommend an Ovarian Reserve Test?
A doctor may recommend an Ovarian Reserve Test to obtain information about ovarian reserve, which refers to the approximate number of eggs remaining in the ovaries. This assessment is part of fertility testing for women, but it is not sufficient on its own to diagnose every cause of difficulty conceiving.
The test may be recommended in several situations, including:
- Fertility assessment: To help understand ovarian reserve when planning a pregnancy or experiencing difficulty conceiving.
- Preparing for IVF or ICSI: To estimate how the ovaries may respond to ovarian stimulation medications and help guide the appropriate treatment plan.
- Suspected low ovarian reserve: Particularly when there is a family history of early menopause, previous ovarian surgery, or exposure to treatments that may affect ovarian function.
- Evaluation of certain ovulation disorders: AMH levels may be elevated in some women with polycystic ovary syndrome, although the result alone is not enough to confirm the diagnosis.
- Monitoring specific conditions: Depending on the patient's medical history and the treatment plan established by the doctor.
Being asked to undergo this test does not necessarily mean that you have a fertility problem. It may simply be part of an assessment before a particular treatment or a way to obtain additional information that supports medical decision-making. Laboratory results, when interpreted alongside a clinical examination and medical history, can contribute to a more complete picture of reproductive health.
What Is AMH?
AMH, or Anti-Müllerian Hormone, is a hormone produced by the cells surrounding immature eggs inside ovarian follicles. Its level in the blood is used as an approximate indicator of ovarian reserve, meaning the number of small follicles containing eggs in the early stages of development.
Generally, the more small follicles present, the higher the AMH level tends to be. As the number of these follicles decreases, AMH levels may also decline. However, this relationship does not provide a direct count of the eggs, and AMH levels naturally vary with age, generally decreasing as a woman gets older.
An AMH test helps estimate how the ovaries may respond to stimulation medications used in fertility treatment. Nevertheless, it cannot determine egg quality, confirm ovulation in every menstrual cycle, or guarantee or rule out pregnancy.
It is also important to distinguish ovarian reserve from overall fertility. Fertility is influenced by several factors, including age, egg quality, regular ovulation, the health of the fallopian tubes and uterus, as well as factors related to the male partner's sperm. Therefore, an Ovarian Reserve Test is only one part of the assessment and should not be considered a final judgment of a woman's ability to conceive.
When Should You Take an AMH Test?
One advantage of the AMH test is that it can generally be performed on most days of the menstrual cycle, unlike certain hormones that are preferably measured during a specific phase. The doctor determines the timing according to the purpose of the test and any other investigations required.
A female fertility test such as AMH may be requested in cases of difficulty conceiving, before IVF or other assisted reproductive treatments, or when factors that may affect ovarian function are present. It may also be used when low ovarian reserve is suspected or as part of an assessment for polycystic ovary syndrome.
Can the Test Be Performed on Any Day of the Menstrual Cycle?
Yes. An AMH test can usually be performed on any day of the menstrual cycle because it is less affected by cycle-related hormonal changes than hormones such as FSH. It does not usually have to be performed on the second or third day of the cycle. However, the doctor may request other hormone tests on specific days to obtain a more complete assessment.
If the test is part of a group of fertility investigations, it is best to follow the doctor's and laboratory's instructions regarding the timing of each test. You can also contact Nawat Advanced Medical Laboratory to ask about the test requirements before visiting for your requested investigations.
What Factors May Affect the Results?
Several factors may influence the results of an Ovarian Reserve Test, including:
- Age: AMH levels generally decrease as a woman gets older due to the gradual decline in ovarian reserve.
- Polycystic ovary syndrome (PCOS): AMH levels may be elevated in some women with PCOS, but an elevated result alone does not confirm the diagnosis.
- Ovarian surgery and certain medical treatments: Some procedures and treatments may affect ovarian reserve and hormone levels.
- Hormonal contraceptives: Certain hormonal contraceptive methods may influence AMH levels in some women. The doctor should be informed about their use when interpreting the result.
- Differences in testing methods: Results and reference ranges may vary between laboratories and the assays they use.
You should not stop using contraception or discontinue any medication to try to improve your test result without consulting your doctor. The result must also be interpreted in the context of age, medical history, and symptoms rather than relying on a single number.
What Are Normal AMH Levels?
There is no single value that can be considered normal for every woman. Normal AMH levels depend on age, the testing method, the laboratory's reference range, and the reason for performing the test.
Results are commonly reported in nanograms per milliliter (ng/mL), although some reports use picomoles per liter (pmol/L). It is therefore important to check the unit before comparing your result with published figures or previous test results.
In general, levels that are low compared with the expected range for a woman's age may indicate reduced ovarian reserve. Higher levels may be associated with a greater number of small ovarian follicles and may also occur in some women with PCOS. However, the meaning of a result cannot be determined without considering age, the testing method, and the medical context.
A single number should not be used to judge a woman's ability to become pregnant. Even if AMH is low, natural pregnancy may still be possible. Similarly, a high level does not guarantee pregnancy or indicate good egg quality. It is best to refer to the laboratory's reference range and discuss the result with a gynecologist or fertility specialist.
What Do Low or High AMH Results Mean?
The meaning of an AMH result varies according to the woman's health condition. A high or low level alone cannot establish a diagnosis or determine the appropriate treatment plan.
First: Low Ovarian Reserve
A low result may indicate that the number of remaining small ovarian follicles is lower than expected for the woman's age. This may be important when planning fertility treatment because some women with low ovarian reserve may have a lower-than-expected response to ovarian stimulation medications.
However, low ovarian reserve does not necessarily mean that pregnancy is impossible, nor can it independently predict when menopause will occur. The doctor needs to consider age, menstrual regularity, reproductive history, and other test results. An ultrasound examination may also be requested to estimate the number of antral follicles in the ovaries.
Second: High AMH Levels
High AMH levels may be associated with a greater number of small ovarian follicles. They may also occur in some women with polycystic ovary syndrome. However, PCOS cannot be diagnosed based on an AMH test alone. Diagnosis requires an assessment of symptoms, menstrual regularity, signs of increased androgen levels, and other appropriate investigations according to medical criteria.
Third: AMH Levels Within the Expected Range
If the result falls within the expected range for the woman's age and laboratory, it may indicate that ovarian reserve is within the reference range. However, this does not guarantee pregnancy or rule out all possible causes of difficulty conceiving.
The best way to respond to the result is to discuss it with a doctor, who can determine whether additional tests, monitoring, or treatment are needed. Results from an Ovarian Reserve Test, together with other medical information, can help guide decisions about the next steps.
Can an AMH Test Determine Your Ability to Get Pregnant?
No. An AMH test cannot independently determine a woman's ability to conceive naturally, provide an accurate percentage of her chances of becoming pregnant, or predict when she may need fertility treatment. It measures an indicator associated with ovarian reserve, but it does not measure egg quality or assess every factor that affects fertility.
It is important to distinguish between three different concepts:
- Ovarian reserve: Refers to the approximate number of small follicles remaining in the ovaries. AMH helps assess this reserve.
- Egg quality: This is strongly associated with age, and an AMH test cannot directly measure it.
- Chances of pregnancy: These depend on several factors, including ovulation, the health of the uterus and fallopian tubes, the timing of intercourse, and fertility factors related to the male partner.
Therefore, a woman with low AMH may still become pregnant naturally, while another woman with normal levels may experience difficulty conceiving due to a different factor. The test may also help estimate how the ovaries could respond to stimulation medications during IVF or ICSI, but it cannot independently predict treatment success or pregnancy.
The American College of Obstetricians and Gynecologists (ACOG) cautions against using AMH measurements alone to predict fertility in women who have not been diagnosed with infertility. For this reason, when the goal is to investigate difficulty conceiving, the test should be part of a comprehensive medical assessment rather than used as a standalone measure of pregnancy chances.
What Is the Difference Between AMH and FSH Tests?
Both the Ovarian Reserve Test AMH and the FSH test are used to assess certain aspects of ovarian function. However, they differ in the hormone measured, the timing of testing, and the information they provide about fertility.
- AMH test: Measures Anti-Müllerian Hormone, which is produced by cells surrounding small ovarian follicles. It helps estimate ovarian reserve and the expected response to ovarian stimulation medications. It can generally be performed on most days of the menstrual cycle.
- FSH test: Measures follicle-stimulating hormone, which is produced by the pituitary gland. It helps assess ovarian function as part of fertility testing. Doctors often recommend performing it on the second or third day of the menstrual cycle, sometimes alongside an estradiol (E2) test.
- Interpreting the results: AMH helps estimate ovarian reserve, while FSH is interpreted alongside age, the menstrual cycle phase, and other hormone results. A doctor may request both tests to obtain a more comprehensive assessment.
- Can either test determine pregnancy chances? Neither AMH nor FSH can independently determine the chances of natural pregnancy or measure egg quality. Fertility depends on several factors, including age, regular ovulation, the health of the uterus and fallopian tubes, and the male partner's fertility.
Therefore, when undergoing an Ovarian Reserve Test or other fertility investigations, the results should be interpreted in light of medical history and clinical findings. The doctor may recommend additional blood tests or an ovarian ultrasound depending on the individual situation.
Do You Need to Fast Before an Ovarian Reserve Test?
An AMH test usually does not require fasting. It measures the hormone level in a blood sample and generally does not require special preparation. However, if your doctor has requested other tests at the same time, the preparation instructions may differ depending on the type of each test.
Before undergoing the test, it is advisable to inform your doctor about any medications, dietary supplements, and hormonal contraceptives you use, as some factors may affect how the result is interpreted. Do not stop taking any medication or change its dose without medical advice.
You should also check the laboratory's instructions regarding sample collection and result availability. You can visit the Nawat Advanced Medical Laboratory website to learn about available testing services or contact the laboratory to ask about the test requirements.
If you are planning a pregnancy or your doctor has recommended this test, understanding the result in the right medical context can help you make informed decisions in collaboration with your doctor, rather than relying on a single number to assess fertility.
If your doctor has requested an AMH test to evaluate ovarian reserve or as part of fertility investigations, visit the Nawat Advanced Medical Laboratory website to learn about the laboratory's services and available tests. Discuss your results with your doctor to receive an assessment that takes your age, health condition, and reproductive plans into account.
Frequently Asked Questions
What is done for an Ovarian Reserve Test?
An Ovarian Reserve Test involves a simple blood draw to measure hormone levels like AMH and FSH, which indicate the quantity of remaining eggs. To book your fertility evaluation with accurate results, visit nawatlab.com.
What is a normal ovarian reserve count?
A normal Ovarian Reserve Test typically shows AMH levels between 1.0 and 3.0 ng/mL, though optimal ranges vary by age and testing method. To check your exact ovarian reserve, schedule your test at nawatlab.com.
What is a good AMH level for age 35?
For women aged 35, a good Ovarian Reserve Test result usually shows an AMH level around 1.5 to 2.0 ng/mL, indicating healthy fertility. To assess your reproductive potential accurately, book your test at nawatlab.com.
What is the best time to test AMH?
Unlike other fertility hormones, the Ovarian Reserve Test for AMH can be performed on any day of your menstrual cycle. To easily schedule your AMH blood test at your convenience, visit nawatlab.com.
What AMH level to get pregnant?
While there is no single "pregnancy level," an Ovarian Reserve Test showing AMH above 1.0 ng/mL generally indicates a good chance of natural conception. To evaluate your fertility status, book your screening at nawatlab.com.
Conclusion
An Ovarian Reserve Test (AMH) helps estimate ovarian reserve and provides information about the expected ovarian response to stimulation medications. It may also be useful as part of a fertility assessment for women. The test can generally be performed on any day of the menstrual cycle and does not usually require fasting.
However, a low result does not mean pregnancy is impossible, and a high result does not guarantee pregnancy. Normal AMH levels also vary according to age, testing method, and laboratory. Therefore, results should be interpreted alongside medical history, clinical examination, and other tests when necessary.
Reliable Medical Sources
- Cleveland Clinic – Anti-Müllerian Hormone (AMH) Test
- A reference explaining the function of AMH, the uses of the test, and how to understand the results.
- https://my.clevelandclinic.org/health/diagnostics/22681-anti-mullerian-hormone-test
- American College of Obstetricians and Gynecologists (ACOG) – The Use of Antimüllerian Hormone in Women Not Seeking Fertility Care
- Guidance on the limitations of using AMH testing to assess fertility in women who have not been diagnosed with infertility.
- https://www.acog.org/clinical/guidance/committee-opinion/2019/04/the-use-of-antimullerian-hormone-in-women-not-seeking-fertility-care/
- Vitrosens – AMH FIA Testing: Ovarian Reserve, PCOS and Fertility
- Information about using AMH measurements to assess ovarian reserve and their relationship to PCOS and fertility.
- https://vitrosens.com/amh-fia-testing-ovarian-reserve-pcos-fertility/