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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 document concludes that early diagnosis and treatment are crucial for children with hair loss to prevent permanent damage, although not all conditions can be effectively treated.

Immune cells help regulate hair growth, and better understanding this can improve hair loss treatments.

N-WASP is essential for healthy skin and preventing inflammation.

The conclusion is that androgenetic alopecia and senescent alopecia have unique gene changes, suggesting different causes and potential treatments for these hair loss types.

Menopausal women have higher androgen levels, which can cause symptoms like facial hair growth and low sexual desire.

Testosterone improves mood and thinking skills; finasteride has no effect.

Diagnosing PCOS in teenagers should focus on signs of excess male hormones and not rely solely on ovarian ultrasound or irregular periods, and should be reassessed in adulthood.

Acitretin is effective for severe psoriasis and can be used long-term due to no immunosuppression, but must be carefully monitored for side effects and is not for pregnant women.

Mesotherapy might help reduce fat in specific areas for those close to their ideal weight, but more research and care are needed to ensure safety.

Mutations in the HEPHL1 gene cause abnormal hair and cognitive issues.

Pollution exposure speeds up hair damage.

NF-κB is crucial for different stages and types of hair growth in mice.

New male hormonal contraceptives show promise but need more research on long-term effects and funding for larger trials.

The study concluded that a special imaging technique showed women with hair loss have slower hair growth and a faulty hair replacement cycle.

Finasteride blocks progesterone's effect on absence seizures in rats.

Human hair follicles have a unique metabolism that changes between growth stages and may contribute to baldness.

Platelet-rich plasma might help with skin aging, ulcers, and hair loss, but more research is needed to prove its effectiveness and safety.

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.

Dutasteride does not impair mental function in elderly men with enlarged prostate.

The document concludes that there are still unknowns about the effectiveness, risks, and detection of performance-enhancing drugs, and doping remains a challenge.

Blocking CXXC5 speeds up diabetic wound healing by improving blood vessel growth and skin repair.

New treatments for hair loss may target specific pathways and generate new hair follicles.

High-dose radiation speeds up aging in skin stem cells.

The conclusion is that skin and hair patterns are formed by a mix of cell activities, molecular signals, and environmental factors.

In Japan, sex reassignment surgery for gender identity disorder faces challenges and needs better medical support and education.

High glucocorticoids cause pancreatic malfunction and malabsorption, reversible with enzyme supplements.

Hair's strength and flexibility come from its protein structure and molecular interactions.

miR-140-5p in certain cell vesicles helps hair growth by boosting cell proliferation.

AMT may cause hair loss and changing dWAT activity could help treat it.