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New genes and pathways are important for testosterone production and male sexual development.

The nude gene causes skin cell overgrowth and improper development, leading to hair and urinary issues.

Human hair follicle cells can grow hair when put into mouse skin if they stay in contact with mouse cells.

Some systemic treatments work for nail psoriasis but can have serious side effects.

Keratin 79 marks a new group of cells that are key for creating and repairing the hair follicle's structure.

The conclusion is that individual differences in COVID-19 severity are influenced by factors like age, sex, race, and genetics, which are important for personalized medicine.

Products should be called 'sperm-safe' only after thorough, well-designed tests.

Antiandrogens, particularly flutamide and CPA, are most effective for treating hirsutism, with long-term use needed for best results.

5α-reductase inhibitors and alpha-1 adrenergic antagonists together effectively treat benign prostatic hyperplasia, with long-term benefits.

Certain drugs that block specific enzymes can help treat prostate diseases.

Estrogens generally inhibit hair growth and improve skin quality, but their exact effects on hair follicles are complex and not fully understood.

The conclusion is that genetic changes in the glucocorticoid receptor can lead to conditions affecting stress response, immunity, and metabolism, requiring personalized treatment.

Assessing newborn scalp hair can reveal important health information.

The conclusion is that androgen receptor gene polymorphism might be a marker for polycystic ovary syndrome, but more research is needed.

Longer CAG repeat lengths in the androgen receptor gene are linked to higher testosterone levels in women with PCOS.

Finasteride may cause sexual side effects like erectile dysfunction, but they are reversible and affect less than 2% of men.

Adrenal disorders can cause lasting brain and behavior issues in children.

The document concludes that identifying the cause of amenorrhea is crucial for proper treatment.

Accurate clinical, histological, and genetic methods are key for understanding and treating hair disorders.

Mice are useful for researching human hair loss and testing treatments, despite some differences between species.

Androgens like testosterone are important hormones for both men and women, made differently in each sex and affecting the body by regulating genes and quick interactions with cell components.

DHT's role in hair loss is important, but measuring its level for diagnosis is questionable.

Measuring reproductive hormones in brown bear hair could help identify their sex and reproductive state, but better collection methods or lab techniques are needed.

Madarosis is the loss of eyelashes and eyebrows due to various health issues and requires thorough examination to diagnose and treat the underlying cause.

Cellular senescence has both cancer-blocking and cancer-promoting effects, and targeting senescent cells may improve health and lifespan.

Amenorrhea is when a woman doesn't have periods, with primary amenorrhea starting by age 15 or within five years of breast development, and secondary amenorrhea when periods stop for three months. It affects 3-4% of women not pregnant, breastfeeding, or in menopause, mainly due to polycystic ovary syndrome, hypothalamic amenorrhea, hyperprolactinemia, and ovarian failure.

The document concludes that early diagnosis and treatment are crucial for children with hair loss to prevent permanent damage, although not all conditions can be effectively treated.

The research suggests that Tourette syndrome is linked to both brain signaling and immune system pathways.

Eyebrow loss has many causes and requires accurate diagnosis for proper treatment.

Insulin resistance is linked to high male hormone levels in women, often seen in those with PCOS.