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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.

Recent genetic insights show that low-renin hypertension includes a range from essential hypertension to secondary or familial forms, affecting diagnosis and treatment.

Adult stem cells are important for tissue repair and have therapeutic potential, but more research is needed to fully use them.

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.

Platelet-rich plasma (PRP) treatment has been found effective in promoting hair growth for alopecia patients, with minimal side effects like temporary pain and redness.

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.

Cat color patterns are determined early in development by gene expression and epidermal changes, with the Dickkopf 4 gene playing a crucial role.

Understanding how epigenetic regulation affects stem cells is key to cancer insights and new treatments.

The conclusion is that skin and hair patterns are formed by a mix of cell activities, molecular signals, and environmental factors.

Neurosteroids can influence behavior by modulating brain inhibition, with potential for treating psychiatric disorders.

Metformin helps regulate menstrual cycles, induce ovulation, and improve pregnancy outcomes in women with PCOS.

Canine epidermal neural crest stem cells could be a promising treatment for spinal cord injuries in dogs.

The document concludes that careful surgical methods and choosing the right materials are key for successful scalp, skull, and frontal sinus reconstruction.

An imbalance in gut bacteria is linked to skin immune diseases and may affect their outcomes and related health issues.

Timing of light therapy affects horse coat growth, with photoperiod being crucial.

High levels of male hormones in women without tumors are linked to metabolic problems and can be treated with metformin.

The article concludes that dermatologists should prescribe lifestyle drugs carefully and consider mental health treatments for patients with disorders like BDD.

Female mice with disrupted 5α-reductase 1 had significant metabolic issues, including stress response problems, insulin resistance, liver fat buildup, and obesity.

DHT affects bone growth by altering gene activity in osteoblasts, potentially complicating steroid use.

Medications for enlarged prostate can cause sexual side effects like reduced libido, erectile dysfunction, and ejaculatory problems.

We need better ways to test and understand SARMs to make safer and more effective treatments.

Using a blow dryer in a certain way can cause localized hair damage with bubble formation inside the hair.

Finasteride use can cause lasting negative effects like sexual dysfunction, depression, anxiety, and cognitive issues.

A machine learning model called CATNIP can predict new uses for existing drugs, like using antidepressants for Parkinson's disease and a thyroid cancer drug for diabetes.

Urologic diseases and treatments in older men can negatively affect fertility, and doctors should talk to patients about this.

Researchers found four key proteins that affect the development of a specific hair type in Yangtze River Delta white goats.

Cyproterone acetate is the preferred treatment for women's hyperandrogenism when estrogen/progestogen use is safe.

A specific group of slow-growing stem cells marked by Thy1 is crucial for skin maintenance and healing in mice.

A specific RNA in cashmere goats helps improve hair growth by interacting with certain molecules.

Ritlecitinib shows promise as a versatile treatment for various autoimmune and inflammatory diseases.