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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.

Most hair loss in captive rhesus macaques is likely due to environmental and behavioral factors.

Scalp hair grows at 0.37 mm/day, forearm hair at 0.18 mm/day, and thigh hair at 0.30 mm/day, with no significant differences found in people with certain hair conditions.

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.

A 72-year-old man had severe fatigue, weight loss, and frequent loose stools.

Wild geladas in crop areas show less grooming and aggression.

Eating selenium-rich rice improved antioxidant activity and signs of aging in mice.

Most white Spanish women have a widow's peak, and their hairline measurements could help in hair restoration surgery.

Stinging nettle has compounds that help with joint pain, arthritis, and prostate issues.

A horse with severe hair loss was diagnosed with alopecia areata and a yeast infection.

Eastern Red Bat hair contains various glycerophospholipids, mainly phosphatidylcholine.

Spirulina extract and C-phycocyanin may help heal wounds.

Skin structure complexity and variability are crucial for assessing skin toxicity in safety tests.

Growth factor treatments are increasingly used in medicine but require more research to fully understand their mechanisms.

Adiantum capillus-veneris may help with respiratory issues, but more research is needed.

Hidradenitis Suppurativa is a chronic skin condition best treated early with surgery for better outcomes and less recurrence.

Dental pulp stem cells might not reliably become neurons.

Some nutrients and antioxidants may improve skin and hair health, but more research is needed to confirm these benefits.

Coconut leaf vermiwash improves soil health and crop yields in organic farming.

Integrin alphavbeta6 is important for wound healing and hair growth, and blocking it may improve these processes.

Hair transplantation improves life quality and self-esteem in men with male pattern baldness.

Targeted anticancer therapies in children often cause skin side effects like rash and dry skin.

Diagnosing and treating PCOS in teenagers is difficult, and the focus is on lifestyle changes and medication to improve health and prevent future issues.

CGF therapy may effectively treat psoriasis by reducing inflammation.

Hair loss peaks in spring and regrowth in late summer, with pregnant females losing the most hair.