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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.

Sp6 promotes tooth development by reducing follistatin levels.

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.

Human hair grows better in a special gel that mimics skin.

Hair growth genes work better with more glucose due to changes in gene-regulating markers.

Tumor cells in calcifying epithelioma of Malherbe resemble hair follicle cells.

Leucaena seeds are nutritious but need treatment to reduce toxicity.

Kiwi is a nutritious fruit that boosts immunity, aids digestion, and supports heart health.

Gene therapy shows promise for treating skin disorders and cancer, but faces technical challenges.

Ziziphus spina-christi leaf extract lowered blood sugar and protected organs in diabetic rats.

Microneedle patches improve drug delivery for skin treatments and cosmetic enhancements.

Lignans and neolignans from plants may help protect against various health issues, including cancer and heart disease.

Hair follicles can regrow in wounded adult mouse skin using a process like embryo development.

Hair follicle development is controlled by interactions between skin tissues and specific molecular signals.

Improving artificial vascular grafts requires better materials and surface designs to reduce blood clotting and support blood vessel cell growth.

Hoxc13 gene is essential for hair, nail, and papilla development.

Understanding where cancer cells come from helps create better prevention and treatment methods.

A gene called APCDD1, which controls hair growth, is found to be faulty in a type of hair loss called hereditary hypotrichosis simplex.

Male hormones and their receptors play a key role in hair loss and skin health, with potential new treatments being explored.

A new mutation in the human glucocorticoid receptor reduces its function and causes resistance to glucocorticoids.

The Foxn1 gene mutation causes hairlessness and immune system issues, and understanding it could lead to hair growth disorder treatments.

Mutant mice help researchers understand hair growth and related genetic factors.

Wnt signaling is crucial for skin and hair development and its disruption can cause skin tumors.

PPAR agonists show promise for skin conditions but need more research before being a main treatment.

Oxidative stress damages hair and contributes to aging, and managing it can help maintain hair health.

Pitx2 helps outer root sheath cells differentiate but can't start hair growth on its own.

Eclipta alba extract shows potential as an anticancer agent by inhibiting cancer cell growth and promoting cell death.

The hair follicle infundibulum plays a key role in skin health and disease, and understanding it better could lead to new skin disease treatments.

The Ovol2-Zeb1 circuit is crucial for skin healing and hair growth by guiding cell movement and growth.

Wnt/ß-catenin signaling is crucial for regulating skin stem cells and hair growth, with the right levels and timing needed for proper function.