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Hormones and neuroendocrine factors control hair growth and color, and more research could lead to new hair treatment options.

Excessive hair growth can be assessed by history, exam, and blood tests, and treated with medication like dexamethasone, birth control pills, and spironolactone.

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

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.

Flutamide combined with an LHRH agonist effectively inhibits prostate growth, suggesting it could treat prostate cancer.

Low testosterone and SHBG levels are linked to higher COVID-19 death rates.

Cholesterol balance is important for hair health, and problems with it can lead to hair loss conditions.

Thyroid diseases may contribute to autoimmune skin diseases, and more research is needed on their relationship.

Amenorrhea, or the absence of periods, should be evaluated by age 15 or within five years of early breast development, and is most commonly caused by conditions like polycystic ovary syndrome and hypothalamic amenorrhea.

Long-term use of dutasteride for enlarged prostate may worsen blood sugar, cholesterol, and erectile dysfunction.

Hormone therapy for prostate cancer can increase heart risks, especially in men with heart conditions.

COVID-19 may harm male fertility and damage the reproductive system.

PCOS in teens causes hormonal imbalances, irregular periods, and can lead to infertility and other health issues.

Prostate-specific antigen may be a new marker for excess male hormones in women with polycystic ovary syndrome.

Hormone imbalances can cause skin diseases, and understanding these links is important for diagnosis and treatment.

COVID-19 and hypopituitarism (reduced pituitary gland function) are linked, with the latter's related health issues potentially worsening COVID-19 outcomes, and COVID-19 possibly increasing risk for pituitary complications.

Metformin works better for adolescent girls with PCOS who have certain genetic variations.

Skin diseases linked to insulin resistance should be managed to prevent diabetes and reduce heart disease risk.

5α-reductase inhibitors may worsen sexual drive and spontaneous erections but don't worsen existing erectile or ejaculatory problems.

Fetal ovaries produce different hormones than adult ovaries, and endocrine-disrupting chemicals may affect this process.

Kidney-yang deficiency syndrome causes hormonal imbalances and various physical symptoms.

Estrogens are key for bone growth spurts in both boys and girls and affect growth into adulthood.

Gender affirming hormone therapy improves outcomes in gender affirmation surgery.

Mutations in the CYP21A2 gene are not a major factor in causing PCOS.

More than half of patients who had acromegaly surgery experienced hair loss, with varying degrees of recovery.

Hormone therapy may increase migraines in transgender women and decrease them in transgender men; more research is needed on migraine management in transgender individuals.

Baldness in men with prostate cancer is linked to higher levels of certain sex hormones, but chest hair density is not.

Women with epilepsy on certain medications might gain weight and have higher thyroid-stimulating hormone levels, but not more polycystic ovarian syndrome.

Testosterone replacement may help postmenopausal women with sexual function and bone density, but suitable treatments are limited.