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The article concludes that developing in vitro models for human hair structures is important for research and reducing animal testing, but there are challenges like obtaining suitable samples and the models' limitations.

Hair follicles are valuable for regenerative medicine and wound healing.

New treatments targeting immune pathways show promise for severe hair loss but need more research for safety and effectiveness.

Scalp hair follicle culture has limits for testing minoxidil's hair growth effects.

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.

Minoxidil helps prevent stress-caused hair loss in mice.

Alopecia areata is an autoimmune hair loss condition treated with corticosteroids, and histologic confirmation is the best diagnosis method.

With careful management, people with congenital adrenal hyperplasia can have successful pregnancies and become parents.

Ginsenoside Rb1 from Panax ginseng helps mink hair grow by activating certain cell signals.

The document concludes that while lab results for hair growth promotion are promising, human trials are needed and better testing methods should be developed.

Certain human skin cells marked by CD44 and ALDH are rich in stem cells capable of long-term skin renewal.

Minoxidil nanoparticles can potentially be a more effective treatment for hair growth than current treatments.

Undariopsis peterseniana extract helps hair grow by activating certain cell growth pathways and could be a new treatment for hair loss.

The skin and thymus develop similarly to protect and support immunity.

Researchers found that bulge cells from human hair can grow quickly in culture and have properties of hair follicle stem cells, which could be useful for skin treatments.

Severe baldness on the top of the head is linked to a higher chance of heart disease, especially in men under 60.

SLN suspensions work as well as commercial solutions for minoxidil delivery, but are non-corrosive, making them a promising alternative.

Calcium is important for stem cell function and maintenance, especially in blood and skin cells.

Combined microneedling and minoxidil improves hair growth more than minoxidil alone.

Minoxidil helps hair grow by improving blood flow and increasing growth factors in hair follicles.

Some plants with flavonoids may help treat hair loss and promote hair growth.

Some growth factors, while important for normal body functions, can cause diseases when not regulated properly.

Hair restoration surgery can have complications; success depends on patient education, careful planning, and proper execution.

Minoxidil promotes hair regrowth, but more research needed for effectiveness and response factors.

The document concludes that eyelash trichomegaly, which is the abnormal growth of eyelashes, can be present from birth, caused by diseases, or result from certain medications.

DHT stops hair regrowth in mice, similar to human hair loss.

Different sPLA2 enzymes affect immunity, skin and hair health, reproduction, and may be potential targets for therapy.

Using defensins to activate stem cells may improve skin aging signs without causing inflammation.

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.

Some drugs can cause skin and hair color changes, often reversible when the drug is stopped.