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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.

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

High-content screening is useful for finding new treatments for rare diseases and has led to FDA-approved drugs.

Lipocalin-2 levels are higher in women with PCOS and may indicate insulin resistance.

Parkinson's disease is linked to skin disorders and skin cells help in studying the disease.

Ancient Chinese goats evolved cashmere-producing traits due to selective breeding, particularly in genes affecting hair growth.

The European Society of Cutaneous Lupus Erythematosus created a questionnaire to standardize patient assessment and improve care for cutaneous lupus.

The document says that understanding the causes of PCOS is important for treatment, especially in distinguishing the syndrome from just having cystic ovaries, and that losing weight is key for obese women with PCOS.

Finasteride worsens seizures in epilepsy rats and speeds up epileptogenesis in mice.

ISCK03 stops melanin production in human melanoma cells and lightens skin color in mice and guinea pigs.

Minoxidil helps treat severe high blood pressure.

Six new hair loss factors in men not linked to female hair loss.

The hair keratin gene KRT81 is found in both normal and breast cancer cells and helps them invade surrounding tissues.

The HGCA tool helps identify genes that work together by analyzing their co-expression patterns.

Betacoronaviruses, like COVID-19, may cause hormone system dysfunction and affect disease susceptibility and severity.

Treatment can improve survival and symptoms in dogs with Cushing's disease, but outcomes are unpredictable.

Finasteride reduces dihydrotestosterone, increases testosterone, and may treat hirsutism in women.

Vemurafenib therapy can cause hair loss, but clobetasol propionate foam can help regrow hair.

Researchers developed a reliable method to measure testosterone and epitestosterone in urine for medical and anti-doping use.

Asian hair is stronger and more damage-resistant than Caucasian hair due to a thicker cuticle layer.

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.

Avicequinone C, a compound found in the Avicennia marina plant, can reduce hair loss by inhibiting a hormone linked to androgenic alopecia.

FDG PET/CT scans can change cancer treatment plans for dogs.

Alopecia areata has a complex genetic basis that was not fully understood as of 2001.

No link found between aromatase gene and female hair loss.

Propranolol combined with injections caused skin changes in guinea pigs but didn't fully mimic psoriasis.

A boy's growth and immune problems were caused by a new mutation in the STAT5B gene.

The conclusion is that a thorough approach is needed to diagnose and manage hyperandrogenism in teenage girls, recognizing its major psychological and health effects.

Long COVID patients have more health issues than non-infected people.

Researchers developed a cost-effective 66 K SNP chip for cashmere goats that is accurate and useful for genetic studies.