AMH (Anti-Mullerian Hormone)

A hormone often used to estimate ovarian reserve (egg count).

What is Anti-Mullerian Hormone (AMH)?

Anti-Mullerian Hormone (AMH) is a protein hormone produced by the granulosa cells in your ovarian follicles. These follicles are the small fluid-filled sacs in your ovaries that contain your resting, immature eggs.

Because AMH is produced directly by these resting follicles, the level of AMH in your blood acts as a relatively stable marker for your ovarian reserve—which is a medical term for the estimated number of eggs you have remaining in your ovaries.

Unlike other reproductive hormones like Follicle-Stimulating Hormone (FSH) or Estrogen, which fluctuate wildly throughout your menstrual cycle, AMH remains relatively constant from week to week. This makes it a popular blood test that can be taken on any day of your cycle.

Why is AMH Important for Fertility?

AMH has become a buzzword in women's health and fertility circles, but there are many misconceptions about what it actually tells you.

What AMH Does Tell You:

• Your Ovarian Reserve: It gives doctors an idea of the size of your remaining egg supply relative to other women your age.
• IVF Response: It is arguably the best predictor of how your ovaries will respond to the injectable fertility medications used during In Vitro Fertilization (IVF) or egg freezing. A higher AMH typically means you will produce more eggs during a retrieval cycle.
• Menopause Timeline: Extremely low or undetectable AMH levels can indicate that menopause is approaching, though it cannot pinpoint the exact year it will happen.
• PCOS Indicator: Very high AMH levels are often seen in women with Polycystic Ovary Syndrome (PCOS) because their ovaries contain many small, underdeveloped follicles that are all pumping out AMH.

What AMH Does NOT Tell You:

• Your Egg Quality: AMH tells you about quantity, not quality. The primary predictor of egg quality is a woman's biological age, not her AMH level. A 30-year-old with low AMH still has 30-year-old eggs, which generally have a high chance of resulting in a healthy pregnancy.
• Your Ability to Get Pregnant Naturally: Several large studies have shown that women with low AMH get pregnant naturally at the same rate as women with normal AMH levels, provided they are ovulating regularly. You only need one good egg per month to conceive naturally!

What is a "Normal" AMH Level?

AMH levels naturally decline as you age. What is considered "normal" at 25 is different from what is expected at 40. While clinical reference ranges vary slightly by laboratory, here are general guidelines:

• High (Often associated with PCOS): Over 4.0 ng/mL
• Normal: 1.5 ng/mL to 4.0 ng/mL
• Low-Normal: 1.0 ng/mL to 1.5 ng/mL
• Low: 0.5 ng/mL to 1.0 ng/mL
• Very Low: Under 0.5 ng/mL

Note: In some regions, AMH is measured in pmol/L. To convert ng/mL to pmol/L, multiply by 7.14.

Signs and Symptoms of Abnormal AMH

Because AMH is a reflection of your follicles rather than a hormone that drives physical changes in your body, you will not feel "symptoms" of low or normal AMH.

However, if your AMH is very high, you may experience symptoms of the underlying condition causing it, such as PCOS:

• Irregular or missing periods
• Excess facial or body hair (hirsutism)
• Acne
• Unexplained weight gain

If your AMH is very low due to approaching menopause or Premature Ovarian Insufficiency (POI), you might experience:

• Shorter menstrual cycles (e.g., dropping from 28 days to 24 days)
• Hot flashes or night sweats
• Vaginal dryness

How to Test Your AMH Levels

Testing AMH is simple. It requires a standard blood draw and, unlike day-3 FSH testing, you do not need to be fasting or on a specific day of your menstrual cycle.

You can ask your Ob/Gyn or a Reproductive Endocrinologist to order the test. Recently, at-home fertility hormone testing kits that use a finger-prick blood sample have also become popular and accessible.

Frequently Asked Questions (FAQs)

Can I increase my AMH levels?

In short, no. Women are born with a finite number of eggs, and that number naturally decreases over time. There is no scientifically proven way, supplement, or diet to create new eggs or permanently increase your ovarian reserve (and thus, your AMH). Some holistic practitioners suggest taking Vitamin D or DHEA, but evidence is mixed, and this should only be done under medical supervision.

If my AMH is low, do I need IVF immediately?

Not necessarily. If you are under 35, have regular cycles, and no other known fertility issues (like blocked tubes or severe male factor infertility), you can still try to conceive naturally. Low AMH does not mean you are infertile. However, it does suggest your reproductive window may be shorter than average, so it is wise to consult a fertility specialist sooner rather than later.

The Bottom Line

AMH is a valuable data point, but it is just one piece of a complex puzzle. It is not an absolute measure of your fertility. Understanding your cycle, tracking your ovulation accurately with tools like the Bloom App, and maintaining a healthy lifestyle are foundational steps in any reproductive journey. If you have concerns about your AMH levels, always discuss them with a qualified healthcare provider.