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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.

Higher early lead exposure is linked to delayed puberty in girls.

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

SOX9 is essential for the development of various organs and hair follicles.

Kangfuxin (KFX) extract speeds up wound healing and improves skin regeneration.

Mollusc egg extract helps skin and hair cells grow and heal.

The biofilm-dispersing wound gel helps wounds heal faster and prevents infection.

150 kHz electromagnetic radiation might help improve PCOS in rats.

A new mRNA variant of the SCF gene in sheep skin produces a shorter, different protein.

Ficus carica extract improved fertility in rats and may help with certain health conditions.

Hair transplant surgery successfully restored a woman's pubic hair, improving her appearance and satisfaction.

Certain genes are linked to the quality of cashmere in goats.

Hedgehog signaling in skin cells is crucial for hair growth and skin healing, but needs to be balanced to avoid harmful effects like scarring and cancer.

Activating the GDNF-GFRα1-RET signaling pathway could potentially promote skin and limb regeneration in humans and could be used to treat hair loss and promote wound healing.

The study found specific skin cells and genes that may affect the quality of cashmere in Liaoning Cashmere Goats.

Giving selenium yeast to pregnant goats leads to better hair growth and cashmere quality in their babies.

Herbal treatments can help manage PCOS symptoms.

Centratherum anthelminticum seed extract effectively treats Polycystic Ovary Syndrome in rats.

Exosomes may improve skin, scars, hair growth, and fat grafts in plastic surgery, but more research is needed.

The document concludes that more research is needed to understand how PRP affects the ovaries and to standardize its use in treatment.

A parasite-derived molecule speeds up skin healing and affects immune cell behavior without increasing scarring.

MicroRNAs are crucial for skin development, regeneration, and disease treatment.

A 19-year-old male with delayed puberty was successfully treated for a condition that prevents normal hormone production.

Different hair follicles in the skin are innervated by unique combinations of mechanosensory neurons, crucial for touch sensation.

Hydrogel scaffolds can help wounds heal better and grow hair.

Human hair is made up of different keratins, some strong and some weak, with specific types appearing at various stages of hair growth.

Stem cells are crucial for wound healing and understanding their role could lead to new treatments, but more research is needed to answer unresolved questions.

Different small areas within hair follicles send specific signals that control what type of cells stem cells become.

The skin is a complex barrier for drug penetration, but understanding its structure and interactions can improve drug delivery methods.

Cannabinoids may help treat various skin conditions.