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This study found that combining cyproterone acetate with testosterone enanthate was highly effective in suppressing spermatogenesis, suggesting potential as a reversible male contraceptive method.

This study found that zinc deficiency in goats led to lower plasma zinc levels, decreased growth rate, smaller testicles, reduced libido, and was associated with higher mortality compared to control goats.

The authors reported that young men with infertility-related conditions experienced improved seminal quality after stopping finasteride, suggesting potential adverse effects on fertility during treatment.

In this study, finasteride treatment for 56 days in adult rats led to sloughing of immature germinal cells and reduced sperm content in the epididymis, indicating its importance for maintaining spermatogenesis.

This article reviews the effect of aging on male hormone levels and fertility, highlighting the need for more research on the benefits and risks of androgen supplementation in older men.

This review discusses the physiological basis, history, and current development of male hormonal contraception, highlighting its potential risks and benefits, but reports no new research findings.

This study reported that semen quality improved in three young men after discontinuing long-term finasteride use, although meiotic abnormalities persisted.

This article discusses concerns and recommendations from a French-speaking andrology society regarding COVID-19's potential impact on men's reproductive health and calls for further research in this area.

This study reviews the mechanisms by which SARS-CoV-2 may impact male fertility, noting potential disruptions in spermatogenesis and hormone secretion, and underscores the need for follow-up in recovered men.

This study concluded that mesotherapy with a dutasteride-containing solution was the most effective option for treating androgenetic alopecia in males, promoting hair growth and reducing hair loss.

This study found that paternal exposure to finasteride in male rats may impair fertility and affect androgen-sensitive spermatogenesis in their male offspring.

This review suggests that telocytes in male reproductive organs help organize tissue structure and paracrine factors, impacting organ development and pathology, but more research is needed on their molecular pathways.

This study suggests that in gilthead seabream, DHT is involved in the onset of the meiotic phase of spermatogenesis and influences serum levels of E2 through regulation of aromatase activity.

This study found that D-004, a hexanic extract from the Cuban royal palm fruit, did not cause genotoxic effects in male germ cells of mice over an 8-week period.

This study found that SARS-CoV-2 infection was associated with significant upregulation of miR-371a-3p in testicular tissues and serum, leading to androgen receptor downregulation and decreased spermatogenesis in patients.

This review discusses the structure and function of the testes in male reproduction and development, noting the complex hormonal regulation within the hypothalamic-pituitary-gonadal axis but reports no new clinical results.

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 reports that a young man with severe testotoxicosis maintained spontaneous fertility despite suppressed FSH levels, underscoring the importance of high intratesticular testosterone levels for spermatogenesis.

This study found that finasteride treatment in male rats may lead to changes in connexin 43 expression in the testes of their offspring, potentially affecting spermatogenesis.

This review discusses therapeutic options for pubertal induction in congenital hypogonadotropic hypogonadism, focusing on recombinant gonadotropins, and highlights the need for larger randomized trials to determine optimal treatment strategies.

Environmental factors and exposure to toxins may contribute to male infertility by affecting sperm and hormone function.

This review discusses the biology of spermatogenesis and male reproductive toxicology but reports no new research findings.

Finasteride may decrease semen quality but not harm sperm production, and stopping the drug can improve semen quality; hyperprolactinemia can cause infertility but is treatable with medication.

This review reports that 5-alpha reductase inhibitors, used to treat androgenic alopecia, may adversely affect sperm count, sexual function, and hormones in a subset of patients.

This review outlines the major health consequences of anabolic-androgenic steroid abuse, with a focus on sexual and reproductive issues, and suggests management prioritizes cessation and relapse prevention due to lack of robust randomized trials.

This study reports that two oral hormonal agents, dimethandrolone undecanoate and 11β-methylnortestosterone dodecylcarbonate, may effectively suppress hormones to contraceptive levels in men with mild side effects, though longer-term trials are required to confirm their safety and efficacy.

This study found that while finasteride effectively improves hair growth in male androgenetic alopecia, it may affect fertility at higher doses, and the evidence on its long-term sexual side effects is inconsistent and requires more rigorous research.

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 case report described a 39-year-old male with 47XXY/46XX mosaic Klinefelter syndrome who presented with common features of the condition and male pattern baldness seen in his family.

Understanding genes and hormones is crucial for managing male puberty and sex development disorders.