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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.

Hair transplant surgery effectively treated a specific type of hair loss and is recommended as a primary treatment option.

5-Alpha-Reductase inhibitors might help slow down hair loss in Frontal Fibrosing Alopecia but are not a primary treatment and need more research.

Non-infectious skin conditions are more common than infectious ones in Kashmir, but community areas see more infections, suggesting a need for better skin care services in primary health care.

Minoxidil shows promise for alopecia areata, but more research is needed before it can be recommended as a primary treatment.

The document concludes that there are various treatments for diseases linked to scarring hair loss, especially for primary scarring alopecia.

Obesity affects skin health, causing conditions like acanthosis nigricans and may require different treatment approaches.

Videodermoscopy improves diagnosis of hair and scalp disorders and may reduce scalp biopsies.

FGFs-4, -8, and -9 have overlapping roles and are repeatedly used in tooth development.

The conclusion is that proper signaling is crucial for hair growth and development, and errors can lead to cancer or hair loss.

About 7% to 15% of Iranian women have polycystic ovary syndrome, depending on the criteria used to diagnose it.

New insights show Lichen Planopilaris is a rare, scarring hair loss condition, hard to treat, mainly affecting middle-aged women, and significantly impacts mental health.

MIM is crucial for hair follicle formation and regeneration by controlling cilia formation and hedgehog signaling through its interaction with Cortactin and Src.

A specific drug can help treat Lichen Planopilaris, a condition causing permanent hair loss.

Laminin-511 is crucial for early hair growth and maintaining important hair development signals.

Scientists turned mouse stem cells into skin cells that can grow into skin layers and structures.

The document concludes that accurate diagnosis of different types of hair loss requires careful examination of hair and scalp tissue, considering both clinical and microscopic features.

Different body areas in mice produce different hair types due to interactions between skin layers.

Early detection and histopathology are crucial to prevent permanent hair loss in cicatricial alopecia.

A handheld dermatoscope helps diagnose different types of hair loss effectively.

Different scalp reconstruction methods work well, but the best one depends on the patient's unique needs.

Blocking BMP signaling causes hair loss and disrupts hair growth cycles.

Oral dutasteride can potentially treat frontal fibrosing alopecia in postmenopausal women, with some patients showing disease arrest and hair regrowth.

Chemokine signaling is important for hair development.

KAP7.1 and KAP8.2 genes are crucial for cashmere quality in goats.

The study concluded that immune cells attacking hair follicles cause hair loss in alopecia, with genetics and environment also playing a role, and highlighted the potential of certain treatments.

Half of the patients treated with a specific drug for skin cancer experienced hair loss not related to the drug's dosage.

Different species and human skin models vary in their skin enzyme activities, with pig skin and some models closely matching human skin, useful for safety assessments and understanding the skin's protective roles.

Loss of sebaceous glands and inflammation may contribute to the development of scarring alopecia.

Syphilis has a wide range of symptoms that can look like other diseases, and if not treated, it can progress to a more serious stage, especially in HIV-positive patients.