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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.

Finasteride doesn't affect hormone levels in normal men.

Gata6 is important for protecting hair growth cells from DNA damage and keeping normal hair growth.

The document concludes that menopause should be seen as a natural part of aging and managed with personalized care and informed choices.

Higher minoxidil doses in dogs cause faster heart rate, lower blood pressure, and heart issues.

Testosterone therapy seems safe and effective for transgender men with proper care, but more long-term research is needed.

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

Skin cells can help create early hair-like structures in lab cultures.

Different markers are found in stem cells of the scalp's hair follicle bulge and the surrounding skin.

Smad4 is important for healthy hair follicles because it helps produce a protein needed for hair to stick together and grow.

Hirsute women have lower type 2 17β-HSD enzyme levels, which improve with treatment.

Subcutaneous contraceptives can cause side effects like menstrual changes, headaches, weight gain, and pain at the implant site.

Annurca apple supplement safely increases hair growth and keratin in humans.

The document concludes that using LC-MS/MS for measuring androgens is more accurate than older methods, but it needs careful validation and standardized references to be most effective.

PCOS is a complex disorder managed by treating symptoms and requires a team of specialists.

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.

The document says that understanding the causes of PCOS is important for treatment, especially in distinguishing the syndrome from just having cystic ovaries, and that losing weight is key for obese women with PCOS.

Researchers created early-stage hair-like structures from skin cells, showing how these cells can self-organize, but more is needed for complete hair growth.

Finasteride and dutasteride reduce unwanted movements from Parkinson's disease treatment by normalizing certain brain signals.

Human sweat glands contain stem cells capable of self-renewal and forming different cell types.

Some newly made compounds are promising for treating enlarged prostate, hair loss, viruses, and prostate cancer, and might be better than current drugs.

Dying cells can help with faster healing and new hair growth by releasing a growth-promoting molecule.

The study concluded that specific proteins are necessary to maintain the structure that holds epithelial cells tightly together.

Successful hair transplant surgery depends on careful patient selection, proper surgical plan and technique, and attentive aftercare.

Testosterone therapy aims to treat hormone deficiencies and various conditions safely and effectively, but requires careful patient monitoring due to potential side effects.

Researchers found a new gene, hacl-1, that is active in mouse hair follicles during hair growth and may be important for hair biology.

Chitosan/LiCl composite scaffolds help heal deep skin wounds better.

Runx1 controls fat-related genes important for normal and cancer cell growth, affecting skin and hair cell behavior.

Hormonal imbalances, often indicating conditions like PCOS, are common in women with hard-to-treat acne, and a treatment approach addressing these imbalances may be needed.