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This special issue contains abstracts from the ASA 40th Annual Meeting, providing an overview of various studies without reporting new primary results.

In this study, the aqueous extract from Phthirusa pyrifolia leaves significantly decreased testosterone levels in male Wistar rats without causing liver or kidney damage, suggesting potential effects on libido and reproduction.

This chapter reviews the presence and roles of stem cells in various body systems, focusing on their lifelong function in animals and humans, and reports no new experimental findings.

This study found that severe zinc deficiency induced in weanling rats led to growth retardation, hair issues, and dermal lesions, all of which were completely reversed by zinc supplementation.

The guideline recommends mental health involvement in diagnosing gender identity disorder and outlines hormone and surgical treatment protocols, emphasizing safety, informed consent, and long-term monitoring.

This study found that deleting the ATR gene in adult mice led to rapid onset of age-related traits such as hair graying and osteoporosis through reduced regenerative capacity.

This review discusses the various stem cell populations associated with hair follicles and their potential in regenerative medicine, highlighting differences between murine and human hair follicles but reports no new clinical results.

This review discusses nonclassical 21-hydroxylase deficiency as the most common autosomal recessive disorder in humans and highlights the effectiveness of glucocorticoid treatment in reversing related symptoms.

This review discusses the essential roles and complex regulation of PP2A in various physiological processes and reports no clinical results; the authors highlight the need for further mouse model research to explore PP2A's therapeutic potential.

This review discusses genome maintenance mechanisms critical for preventing age-related diseases by preserving stem and progenitor cell potential, but reports no new empirical findings.

This review presents updated tables of mouse mutants with hair growth abnormalities to aid in understanding the molecular mechanisms of human hair disorders, but reports no new clinical results.

This review indicates that many former FDA category D and X systemic dermatologic medications may negatively impact male fertility, with further research needed to assess potential teratogenic effects.

In this study, researchers found an inverse association between baldness and testicular cancer, suggesting androgen activity may influence cancer risk.

This monograph reviews the historical and contemporary use of pomegranate in medicine, detailing its chemical components and applications across various medical fields including oncology, dentistry, and urology.

A 19-year-old male with delayed puberty was successfully treated for a condition that prevents normal hormone production.

This review discusses the role of stem cell progeny as integral components of stem cell niches, offering feedback that may influence different stem cell systems' microenvironments, but it presents no new research findings.

This review discusses the biochemical properties and clinical significance of 5 alpha-reductase isozymes and reports no new clinical results.

This article discusses the bi-compartmental organization of hair follicle stem cell niches for balancing stem cell cycling and organ growth and proposes similar structures may exist in other adult stem cell niches but reports no new experimental results.

This review discusses the role of LPA(3) in embryo implantation and its genetic connection with prostaglandin signaling, but reports no new clinical results.

This study observed that disrupting the Pnkp gene in adult mice resulted in a premature aging-like phenotype, suggesting PNKP's vital role in maintaining normal growth and survival of certain progenitor cell populations.

In this study, oral melatonin given to male Pomeranian dogs with Alopecia X improved semen quality and testicular blood flow in a dose-dependent manner, but altered hormonal balance, indicating complex effects that require further investigation for long-term implications.

This chapter reviews the role of the testes in producing and functioning of testicular androgens and protein hormones, but it presents no new clinical results.

This study observed that numerical chromosomal aberrations were more common in men with severe male factor infertility and azoospermia compared to those with other sperm quality issues, while chromosomal translocations were significantly associated with oligoasthenozoospermia, highlighting important genetic counseling considerations.

This study highlights the need for a comprehensive andrological assessment at diagnosis, including semen and hormonal analysis, to guide fertility preservation strategies, and found that post-orchidectomy semen samples showed improved DNA integrity for assisted reproductive technologies.

This review discusses the potential impact of COVID-19 on the male reproductive system and highlights unanswered questions regarding its mechanisms and implications for men's health and fertility, reporting no new clinical results.

This study found that BNC2 is critical for hair follicle regeneration and other developmental processes, as Bnc2−/− mice exhibit incomplete hair follicle development and developmental defects, and BNC1 cannot substitute for BNC2.

This review discusses the roles of the transcription factor SOX9 in organ development and maintenance, providing insights into its regulation and diverse functions, but reports no new experimental results.

This review discusses androgen therapy in adolescents, detailing current practices and noting the limited use of commercially available testosterone or dihydrotestosterone formulations; no new results are reported.

This study demonstrated that an AR-EGFP transgene can restore AR function and fertility in Sertoli cell-specific AR knockout mice, highlighting its potential use in understanding androgen receptor functions.

This meeting abstract details various lectures and workshops from the 30th Annual Meeting of the American Society of Andrology, including findings on genetic and physiological factors affecting male fertility, but reports no new clinical results.