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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.

Monkeys with hair loss during pregnancy showed higher stress hormone levels and invested differently in their offspring.

Testosterone treatment in transgender teens can worsen acne, requiring careful treatment due to mental health and medication side effects.

Hair growth is cyclic and influenced mainly by local factors.

The document concludes that PCOS is a complex disorder caused by both genetic and environmental factors, affecting women's health in various ways, and requires personalized treatment.

PCOS may start before birth, involves metabolic issues, and can be treated with drugs like metformin and lifestyle changes.

Future hormone therapy trials should match the diverse needs and priorities of the gender-diverse community.

Ptprq has multiple forms that change during inner ear development.

GPR40 agonists help hair growth through the protein ANGPTL4.

PCOS is a common hormonal disorder in women that can lead to serious health problems.

Laser treatment and deroofing are effective options for hidradenitis suppurativa.

Skin-derived precursors in hair follicles come from different origins but function similarly.

Robotic hair transplantation with AI offers more reliable, precise, and efficient hair restoration.

Androgens can cause hair growth in some areas and hair loss on the scalp.

Scaffold-based strategies show promise for regenerating hair follicles and teeth but need more research for clinical use.

Hormones, nutrition, and seasonal changes regulate hair growth cycles, with androgens extending growth phases and factors like aging and malnutrition affecting hair loss and thinning.

The document concludes that side effects from Smoothened inhibitor drugs for skin cancer are reversible and can be managed with a team approach to maintain quality of life.

Serenoa repens (saw palmetto) may cause side effects like hot flashes in children and needs more research for safety in pediatric use.

The research found that Atypical Progeroid Syndrome has unique symptoms and is not caused by the buildup of a certain mutant protein.

Postpartum depression is linked to changes in brain chemicals, inflammation, stress, and certain genes, and can potentially be identified by markers like specific steroids, serotonin levels, and vitamin D levels.

Understanding how cells die in the skin is important for treating skin diseases and preventing hair loss.

Sensory neurons and Merkel cells remodel at different rates during normal skin maintenance.

Sensory neuron and Merkel cell changes in the skin happen independently during normal skin maintenance.

Forensic medicine is crucial for justice and needs continuous innovation and technology integration.

New methods for skin and nerve regeneration can improve healing and feeling after burns.

The conclusion is that certain cell interactions and signals are crucial for hair growth and regeneration.

Mycophenolate helps reverse hair loss effects caused by IFN-γ by activating a key hair growth pathway.

Hormones and neuroendocrine factors control hair growth and color, and more research could lead to new hair treatment options.

Estrogens significantly influence hair growth by interacting with receptors in hair follicles and may help regulate the hair growth cycle.

Removing vitamin D and calcium receptors in mice skin cells slows down skin wound healing.