Understanding Your Ovarian Age

Since "ovarian age" became a hot topic on TV, the number of people asking "how old are my ovaries?" in the clinic has sharply increased. As the timing of marriage and first pregnancy grows later, ovarian age has become a fairly realistic concern, especially for those planning pregnancy after their mid-30s. Ovarian age is a different story from the age on your resident registration, so even at the same age there are differences from person to person. Today, let me unravel, step by step, what ovarian age is, how far the AMH test can tell, and how it is good to take the results.

When gauging ovarian age, what is broadly looked at in practice is three things: the number of eggs (oocytes) remaining in the ovaries, the quality of the eggs and embryos, and whether there are genetic abnormalities. All three are connected to the pregnancy rate and also act as important factors in giving birth to a healthy child.

And the single factor that affects all three the most is precisely age. In the clinic, many people think "I'm healthy, so it'll be fine," but the aging of eggs proceeds separately from overall health status. The American College of Obstetricians and Gynecologists (ACOG, 2014) explains that a woman's fertility decreases gradually with age, and that the speed accelerates especially after the mid-30s.

If your periods are irregular or you have other gynecologic concerns together, looking first at what tests are needed when the menstrual cycle is irregular also helps to set direction.

Unlike a man's sperm, a woman is born already having all the eggs she will use throughout her life. The key point is that they are not newly made. According to ACOG (2014), the number of eggs decreases over the lifetime as follows.

The remaining eggs are gradually consumed through ovulation each month until menopause. But it is not simply that the number decreases. While eggs "wait" in the ovary for a long time, their function can decline or genetic alterations can occur, so as age increases, the number and quality change together. Because even at the same age there are differences in the number and quality of eggs depending on various factors, grasping what state your ovaries are in now is connected to pregnancy planning.

AMH (Anti-Müllerian Hormone) is a blood test that helps gauge the amount of eggs remaining in the ovaries, that is, ovarian reserve. Because it is secreted from growing small follicles, the value reflects to some extent the size of the remaining follicle pool in the ovary.

The AMH test has practical advantages.

• It only requires drawing blood, so it is comparatively simple.
• Unlike other hormones related to ovulation, it shows a comparatively constant value regardless of the menstrual cycle, so it is fine to test at any point in the cycle.
• By comparing with age-specific averages, you can gauge where your ovarian reserve stands relative to your peers' average.

The American Society for Reproductive Medicine (ASRM, 2020) summarizes that AMH is a comparatively sensitive indicator for evaluating ovarian reserve and is useful in assisted reproduction for predicting how the ovary will respond to ovulation-induction agents. The number of eggs gradually decreases with age, and accordingly the AMH value also tends to lower together.

The AMH value is only a clue to ovarian reserve, not a number that determines whether pregnancy is possible. This is the point most often misunderstood in the clinic.

AMH only gives information about the "quantity" of eggs; it does not tell the "quality" of eggs or whether natural pregnancy will succeed. The American College of Obstetricians and Gynecologists (ACOG, 2019) considered that there is insufficient evidence for uniformly testing AMH for the purpose of future fertility counseling in women not trying to conceive, and stated that it is difficult to predict the pregnancy rate or possibility of childbirth after IVF from the AMH value alone.

So in practice, we do not look at AMH alone but interpret it by synthesizing other indicators such as antral follicle count (AFC) seen by ultrasound, along with age and medical history. ASRM (2020) also explains that AMH and antral follicle count show a similar trend in ovarian reserve evaluation. Rather than being elated or dejected over one number, it is important to read it within the whole picture.

Low AMH does not mean pregnancy is impossible. In the clinic, many people are greatly disheartened when the AMH value comes out low, but AMH is closer to an indicator showing the reserve remaining in the ovary, not "whether you get pregnant this month."

In fact, cases of natural pregnancy are reported even among women whose AMH is considerably low. However, since in general the lower the ovarian reserve, the more the time available to attempt pregnancy tends to decrease, if you have a pregnancy plan, we recommend not putting it off but receiving infertility specialist care or assisted-reproduction consultation before it is too late. ACOG (2014) recommends that those aged 35 and over receive evaluation if pregnancy does not occur even after 6 months of trying, and those aged 40 and over at an earlier point.

Conversely, a case where AMH comes out higher than peers cannot unconditionally be seen as good either. In polycystic ovary syndrome (PCOS), there are many small follicles, so AMH may be measured high, so rather than looking at the value alone, it must be examined in the whole context. If AMH came out high along with irregular periods, it is helpful to read together understanding polycystic ovary syndrome and whether PCOS can be diagnosed with the AMH test too.

It is best to use the AMH result not as "a score taken once and done" but as a starting point for making a plan. In clinical experience, how you act after receiving the result is far more important than the number itself.

• The result is interpreted comprehensively along with age, menstrual pattern, medical history, and ultrasound findings.
• If you have an underlying condition or a concrete pregnancy plan, it is good to discuss the timing and strategy with your physician in advance.
• If the value came out low, rather than being discouraged, we recommend taking it as an occasion to bring forward your pregnancy plan or receive specialist consultation.

If you want to receive an overall check of women's health and fertility together, you can be consulted through lifecycle screening, and if you want to discuss contraception and pregnancy planning at once, through the pregnancy and contraception clinic.

Ovarian age is deeply related to actual age, and the AMH test is a useful tool for gauging ovarian reserve. However, since AMH is only a clue to the quantity of eggs and cannot determine quality or pregnancy success, it must be viewed together with other tests, age, and medical history. Above all, if you have a pregnancy plan, the wisest choice is to check your body's timetable once "now" rather than "later." Since this is an area that needs multifaceted consultation depending on underlying conditions and individual state, if you have questions, please feel free to inquire by chat consultation.

Written by: Lee Dong-hee Director · Obstetrics and Gynecology Specialist · View medical staff profile

First published April 7, 2021 · Last reviewed May 30, 2026

References: American College of Obstetricians and Gynecologists, Female Age-Related Fertility Decline (2014), American College of Obstetricians and Gynecologists, The Use of Antimüllerian Hormone in Women Not Seeking Fertility Care (2019), American Society for Reproductive Medicine, Testing and Interpreting Measures of Ovarian Reserve (2020)

This article is intended to provide general health information and does not replace individual diagnosis or treatment. If you have symptoms, please consult through a medical visit.