Do androgens support early follicle development and influence AMH?

The role of androgens in female reproductive physiology has shifted from being viewed as simple precursors to estrogens to being recognized as essential regulators of early follicle development. For individuals navigating age-related changes in fertility, understanding how androgens interact with the ovarian reserve is critical.

Clinical and effectiveness evidence

Androgens like testosterone and dehydroepiandrosterone (DHEA) are pivotal for the recruitment and growth of early-stage follicles. Clinical research indicates that:

• Follicle Recruitment: Androgens drive the transition of follicles from the dormant primordial and primary stages into the growing pre-antral and early antral stages. This expansion of the "growing pool" is particularly relevant for women with diminished ovarian reserve (DOR).
• Impact on AMH: Supplementation with DHEA (typically 75mg daily) for 8–12 weeks has been shown to significantly increase serum Anti-Müllerian Hormone (AMH) levels. Meta-analyses report a significant standardized mean difference (SMD = 0.35) in AMH elevation following such interventions.
• Ovarian Reserve Correlation: Large-scale studies involving over 2,000 women have confirmed a positive correlation between serum DHEA-S levels and AMH, reinforcing the link between androgen status and markers of the functional ovarian reserve.

Mechanistic explanations

The influence of androgens is mediated through several precise molecular pathways:

• FSH Sensitivity: Androgens bind to Androgen Receptors (AR) on granulosa cells, upregulating the expression of Follicle-Stimulating Hormone receptors (FSHR). This makes pre-antral follicles more sensitive to FSH, allowing them to survive and grow even when FSH levels are suboptimal.
• Granulosa Cell Proliferation: Androgens stimulate the PI3K/Akt signaling pathway, promoting the proliferation of the granulosa cells that produce AMH.
• Growth Factor Modulation: They interact with growth factors such as IGF-1 and TGF-β superfamily members (GDF9 and BMPs), which are essential for follicle survival and the prevention of premature atresia (cell death) in early-stage follicles.

Bottom line

Androgens are essential drivers of early folliculogenesis. They increase the pool of growing follicles and subsequently raise AMH levels by enhancing FSH sensitivity and granulosa cell activity. This makes androgen status a significant modulator of measurable ovarian reserve markers.