Impact of androgens on fertility - physiological, clinical and therapeutic aspects.

Ovarian androgen synthesis and regulation are essential to ensure adequate steroidogenesis and folliculogenesis. In primates, there is evidence for a direct impact on the number of small antral follicles and on the process of chronic anovulation. Therefore, serum androgen should be more carefully assessed in infertile women. Accurate measurements of serum androgen are required to better identify patients with androgen excess or deficiency. Medical or surgical interventions are able to decrease ovarian androgen excess and to reduce the risk of hyperstimulation. Conversely, androgen supplementation should be considered in women at risk of low ovarian response to gonadotrophins, related to androgen deficiency. This review supports a specific and broad role of androgen in reproductive physiology.