Male hypogonadism--current concepts and trends

Area of Science:

• Reproductive Endocrinology
• Male Reproductive Physiology

Background:

• Recent advances in hypothalamic-pituitary-testicular function knowledge are improving reproductive disorder management.
• Understanding hypothalamic control of gonadotrophin secretion and testicular feedback is crucial.

Purpose of the Study:

• To highlight the need for further research into the neuroendocrine control of gonadotropin-releasing hormone (GnRH) secretion, particularly concerning puberty onset.
• To emphasize the limitations in current knowledge of spermatogenesis and its impact on male infertility management.
• To explore future directions for improving the assessment of infertile men and developing effective male contraception.

Main Methods:

• Review of current understanding of hypothalamic-pituitary-testicular axis.
• Analysis of the complexities of spermatogenesis and its regulatory mechanisms.
• Discussion of limitations in conventional semen analysis and hormonal measurements for diagnosing male infertility.

Main Results:

• Current treatments for male infertility offer limited benefits due to incomplete understanding of spermatogenesis.
• Conventional diagnostic methods for male infertility are insufficient.
• Hormonal male contraception strategies often disrupt spermatogenesis and Leydig cell function, necessitating androgen replacement.

Conclusions:

• Improved assessment of infertile men requires studying sperm function, testicular steroid metabolism, and markers of Sertoli and epididymal function.
• Developing reversible male contraception necessitates exploring alternative approaches targeting the epididymis and sperm-egg interaction.
• Further basic research is essential to advance the management of male infertility and achieve effective male contraception.