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Hair gets thinner, grayer, and changes texture with age due to genetics, environment, and cellular changes, affecting the growth cycle.

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

The gene Msx2 is crucial for hair follicle regeneration during wound healing.

High levels of male hormones are very common in women with PCOS and affect their metabolism differently depending on their weight.

FAI values above 6.4 may suggest high androgen levels and increased metabolic risks in Chinese women of reproductive age.

Genes related to pigmentation, body rhythms, and behavior change during hares' seasonal coat color transition, with a common genetic mechanism in two hare species.

Human body's immune cells are more common in the layer of fat just beneath the skin than in deeper fat layers.

A gene called Gk5 controls lipid production in the skin and affects hair growth.

The document concludes that diagnosing PCOS in teenagers is difficult and should focus on specific hormone levels and menstrual irregularities, while also considering treatment for symptoms and related health issues.

The document concludes that PCOS has a strong genetic component, but more research is needed to fully understand the specific genes involved.

The 25Up study collected extensive data on mental disorders and related factors in Australian twins and siblings to investigate the genetics of psychiatric illnesses.

Trichoscopy helps diagnose frontal fibrosing alopecia, even with unusual patterns.

Metformin helps regulate menstrual cycles, induce ovulation, and improve pregnancy outcomes in women with PCOS.

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

Certain gene mutations are linked to wool quality in sheep and could help in breeding for better wool.

3D cell-derived matrices improve tissue regeneration and disease modeling.

The document concludes that more research is needed to fully understand the causes of PCOS.

Different diagnostic criteria greatly affect PCOS diagnosis rates in teenagers.

Korean patients with PCOS often have skin problems like acne and excess hair, with different symptoms based on their specific PCOS type.

New treatments and early diagnosis methods for permanent hair loss due to scar tissue are important for managing its psychological effects.

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

Wnt7a protein is crucial for development and tissue maintenance and plays varying roles in diseases and potential treatments.

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.

Substances from dental stem cells might help treat hair loss.

Measuring the distance from the anus to the clitoris may moderately help diagnose polycystic ovary syndrome, especially in certain cases.

The Chinese version of the PCOS quality of life questionnaire is reliable and valid for Chinese-speaking women with PCOS.

Indian Hedgehog helps control skin cell growth and protects against aggressive skin cancer.

A certain gene variant may increase the risk of polycystic ovary syndrome in Chinese women.

Alopecia areata causes hair loss due to an immune attack on hair follicles, influenced by genetics and environment.

Biologic treatments for Crohn's disease and ulcerative colitis can cause skin problems, and doctors should adjust treatment if these occur.