Anti-Müllerian Hormone (AMH) is currently one of the key clinical indicators used to evaluate ovarian reserve. Serum AMH levels are positively correlated with the number of preantral and small antral follicles in the ovaries. However, considering AMH as the sole or absolute indicator of fertility potential reflects a common misunderstanding. A comprehensive fertility evaluation—especially when predicting outcomes of fertility treatments—requires a broader range of biological indicators.
The Core Value and Limitations of AMH
AMH is secreted by small growing follicles in the ovaries. Its levels remain relatively stable throughout the menstrual cycle, making it a useful marker for estimating the size of the “recruitable follicle pool”.
According to data from the U.S. Centers for Disease Control and Prevention (CDC) and the Society for Assisted Reproductive Technology (SART):
- AMH < 1.0 ng/mLsuggests reduced ovarian reserve
- AMH > 6.0 ng/mLmay indicate a risk of polycystic ovary syndrome (PCOS)
However, AMH has an important limitation: it mainly reflects the quantity of follicles, not the quality of oocytes.
For example:
- Women with moderate AMH levels may still experience difficulty conceiving if egg quality is poor.
- Women with lower AMH but good egg quality may still achieve pregnancy.
Therefore, both egg quantity and egg quality must be considered when evaluating fertility potential.
A Comprehensive Assessment System: Key Dimensions Beyond AMH
A thorough fertility evaluation should integrate multiple indicators to provide a more accurate picture of ovarian reserve and reproductive potential.
1. Antral Follicle Count (AFC)
AFC is measured via transvaginal ultrasound in the early menstrual phase to count small follicles (2–9 mm) in both ovaries.
< 6 follicles in total may suggest diminished ovarian reserve
AFC is highly correlated with AMH, and using both together improves the accuracy of predicting ovarian response.
2. Basal Hormone Profile
Hormonal testing is typically performed on day 2–4 of the menstrual cycle, including FSH, estradiol (E2), and LH.
FSH > 12 IU/L
E2 > 80 pg/mL
These results may indicate reduced ovarian responsiveness, even if AMH levels appear normal.
3. Metabolic and Nutritional Indicators
- Vitamin D
Serum 25-hydroxyvitamin D > 30 ng/mL is associated with improved IVF outcomes
Deficiency may require targeted supplementation
- Thyroid Function
TSH > 2.5 mIU/L may interfere with ovulation and increase the risk of implantation failure
- Insulin Sensitivity
Women with PCOS (affecting about 13% of reproductive-age women in the U.S.) often experience hyperinsulinemia, which can impair follicle development.
4. Oxidative Stress and Inflammatory Markers
Excessive oxidative stress and chronic inflammation can damage oocytes and negatively affect fertility. Although markers such as high-sensitivity C-reactive protein (hs-CRP) are not routinely tested in fertility assessments, they represent emerging targets for optimizing reproductive health.
Evidence-Based Intervention Strategies: Targeted Nutritional Support
The goal of targeted nutritional support is to improve key stages of oocyte development through scientifically validated nutrients.
Oocyte quality depends not only on the number of follicles, but also on the health of the follicular fluid microenvironment. Importantly, this microenvironment can be optimized through appropriate nutritional interventions, for example:
1. Coenzyme Q10
Mechanism: Supports mitochondrial energy metabolism and acts as an antioxidant
Suitable for: Women with diminished ovarian reserve and advanced maternal age
2. Inositol
Mechanism: Involved in FSH signal transduction and oocyte maturation, helping improve the MII oocyte rate and fertilization rate
Suitable for: Women with PCOS and those undergoing ovulation induction cycles
3. Vitamin D
Mechanism: Regulates reproductive endocrine function and may improve embryo quality
Suitable for: Women with vitamin D deficiency or recurrent implantation failure
4. Melatonin
Mechanism: A potent antioxidant that helps neutralize free radicals
Suitable for: Women with elevated oxidative stress
5. Omega-3 Fatty Acids
Mechanism: Anti-inflammatory effects and helps optimize follicular membrane structure
Suitable for: Women experiencing chronic inflammatory conditions
Conclusion
AMH serves as a baseline rather than an endpoint; when reserves decline, the focus should be on optimizing egg quality. It is recommended to conduct a multi-factor assessment, make lifestyle adjustments, and choose evidence-based nutritional support under professional guidance.
Find out more about female fertility from ENERBABY.