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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.

Small changes in hormones can significantly impact health, showing the importance of sensitive testing for chemicals that disrupt hormones.

Isoproterenol helps hair follicle stem cells turn into beating heart muscle cells.

Hairless protein can both repress and activate vitamin D receptor functions, affecting gene regulation.

Sp6 promotes tooth development by reducing follistatin levels.

Taking zinc supplements can help improve or cure hair loss caused by zinc deficiency.

All types of Platelet-Rich Plasma (PRP) can treat hair loss, but homologous PRP works best due to its higher platelet count and growth factors from multiple donors.

Stress can worsen skin conditions and affect mental health, so doctors should include stress management in skin treatment.

High-intensity interval training improves certain hormone levels and lipid profiles in women with PCOS.

Both genetic and lifestyle factors significantly affect female hair loss.

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.

Using micro-needling, low-level laser therapy, and platelet-rich plasma together significantly improves hair growth in people with hair loss.

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

Certain zinc transporters are essential for healthy skin and managing zinc in the body could help treat skin problems.

TGF-β1 increases androgen receptor activity in hair loss, but Hic-5/ARA55 can counter this effect.

Metabolic syndrome in kids and teens is linked to obesity and increases diabetes and heart disease risk; early lifestyle changes are crucial for management.

EGFR inhibitors can cause various skin issues during cancer treatment, and managing these is important for patient care.

The perception of excessive hair growth in women as abnormal is more influenced by cultural norms than by medical reasons.

Nickel, cobalt, balsam of Peru, fragrance mix, carba mix, and propylene glycol are common allergens causing scalp contact dermatitis.

Diabetex improves diabetic wound healing better than metformin.

Platelet-rich treatments can help improve wound healing and tissue repair.

New patents show progress in developing drugs targeting the Wnt pathway for diseases like cancer and hair loss.

PRP therapy safely improves hair growth in people with hair loss.

Combining plasma rich in growth factors with hair transplant surgery may lead to faster recovery and better outcomes for hair loss treatment.

Environmental and cosmetic factors, including heat, chemicals, and sun exposure, can cause hair loss and damage.

Carboxytherapy can improve skin conditions with few side effects, but results may vary and are not guaranteed.

The document says PCOS is a common hormonal disorder in women, diagnosed by certain criteria, and managed with lifestyle changes and various medications.

Alzheimer's patients have higher levels of certain chemicals in their hair.

Blackcurrant extract may help reduce hair loss by promoting stem cell activity in hair follicles.

PSA levels could help detect illegal steroid use in female athletes but face challenges like cost and PCOS prevalence.