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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.

Testosterone supplements can increase muscle mass and strength in older men with low levels, but long-term effects and risks need more research.

The document suggests that targeting the hormone DHT could be a more effective treatment for prostate cancer than targeting testosterone.

A man with both Klinefelter syndrome and primary hyperparathyroidism showed a rare combination of symptoms and genetic patterns.

Selective Androgen Receptor Modulators (SARMs) are drugs that can control the effects of androgens in different tissues, potentially having fewer side effects and promising for treating various conditions.

Higher BMI and lower testosterone are linked to more aggressive prostate cancer.

PCOS may start before birth, involves metabolic issues, and can be treated with drugs like metformin and lifestyle changes.

The document concludes that current hair loss treatments have limitations and suggests researching new treatments targeting different factors of hair loss.

Proper care and diet are crucial to prevent health issues in gerbils.

Deslorelin implants successfully treated hair loss in two male Keeshonden dogs.

Foreign-body granuloma may be a marker for late-stage Lichen Planopilaris and should be considered in diagnosis.

Finasteride, when taken daily, lowers dihydrotestosterone levels but doesn't noticeably affect adrenal steroid production, except by blocking the 5 alpha-reductase enzyme.

Treat hair loss with finasteride, minoxidil, or surgery; consider side effects and severity.

Teak leaf extract contains compounds that could help treat hair loss.

Mutations in the androgen receptor gene cause Androgen Insensitivity Syndrome, affecting sexual development.

LY320236 is a strong blocker of two enzymes that change testosterone into dihydrotestosterone and might help treat conditions related to male hormones.

Finasteride affects frog testes by increasing testosterone, decreasing 5α-DHT, and impacting genes related to reproduction and other functions.

Severe acne in a young girl may indicate underlying hormonal issues.

A boy with a rare form of early puberty caused by a new gene mutation responded well to treatment aimed at reducing testosterone and preserving adult height.

Serenoa repens is mostly safe but has some risks, especially at high doses or when used with other products for over two weeks.

DGAT1 enzyme is crucial for healthy skin and hair by regulating retinoid levels.

Post-finasteride syndrome causes lasting sexual, neurological, and physical side effects in some people after taking finasteride.

Aging men face unique health issues like erectile dysfunction, prostate problems, and baldness.

Hormones and genes affect hair growth and male baldness.

5α-Reductase inhibitors do not consistently increase testosterone levels in the blood.

Female pattern hair loss is caused by multiple factors and while treatments like topical minoxidil, hormone therapy, and low-level light therapy can help, none can fully cure it.

Hair loss drugs may cause sexual issues and infertility in men.

The gene SDR5A1 is found in scalp hair of both hirsute and normal individuals, but it does not explain differences in hair growth.

Finasteride effectively treats male hair loss, improving growth and density.

Bioengineered nanoparticles can effectively treat hair loss by targeting specific enzymes and receptors.