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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.

Polycystic Ovary Syndrome can cause hair loss and skin issues, and early treatment is important for preventing complications.

Human hair follicle stem cells can become endothelial cells with certain growth factors, useful for vascular treatments.

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.

Topical prostaglandin E2 can help treat both alopecia areata and vitiligo.

The OVOL1 gene, controlled by β-catenin, is crucial for creating hair follicles.

Estrogen receptors may not affect mouse hair growth as previously thought, and oxybenzone in sunscreen is stable in sunlight.

NKIRAS2 can suppress certain skin tumors but its effect on cancer varies with context and expression level.

XMU-MP-1 stops cell growth in a human mini-organ and reduces the effectiveness of the chemotherapy drug paclitaxel.

A man with testotoxicosis was fertile despite low FSH levels, suggesting high testosterone may allow sperm production without FSH.

Controlled light treatment in mouse skin speeds up healing and hair growth.

Scientists created a new cell line from Cashmere goat hair and found that cytokeratin 13 is a unique marker for certain skin cells.

3D cultures respond better to minoxidil, while 2D cultures respond better to DHT.

The new wound dressing helps heal burn wounds and regrow hair by releasing beneficial ions.

ALRN-6924 may prevent hair loss caused by chemotherapy.

STAT5 is crucial for hair growth in 3D cultured human dermal papilla cells.

Diagnosing sex development disorders requires combining medical history, physical exams, imaging, lab tests, and genetic data.

A 19-year-old male with delayed puberty was successfully treated for a condition that prevents normal hormone production.

These supernatants may help reduce hair loss by protecting hair cells.

Targeting Lgr5+ stem cells and Wnt signaling may effectively treat hair loss.

Cinnamic acid may help hair grow by activating oxytocin receptors.

Light therapy might help treat hereditary hair loss by improving hair follicle growth in lab cultures.

The treatment was ineffective in humans.

Androgens may worsen COVID-19 and hair loss could indicate the disease's severity.

Hair follicle sampling is a practical method for measuring biomarkers in children with and without Fragile X syndrome.

The enzyme sEH is important for hair growth and its inhibition could help treat hair loss.

Removing a specific gene in certain skin cells causes hair loss on the body by disrupting normal hair development.

KY19382 helps to regrow hair and create new hair follicles.

Removing STAT5 from 3D-cultured human skin cells reduces their ability to grow hair.

Plasma protein binding significantly affects glucocorticosteroid concentration in blood, saliva, and hair.