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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.

Finasteride given to baby rats causes anxiety-like behavior and worsens learning from punishment in adult rats.

Scientists identified three genes important for processing certain brain chemicals, thyroid hormones, and medications.

Recognizing and managing skin-related psychiatric disorders in children is crucial for effective treatment.

The model showed that randomness accurately describes individual hair growth cycles and that synchronization can cause large fluctuations not seen in humans.

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.

Dogs with sex hormone imbalances may not drink or pee a lot but often lose hair on their body and can have reproductive system issues.

Old drugs can be used for new treatments, saving time and money, but there are challenges like needing more evidence and legal concerns.

Skin and hair changes in horses can indicate serious diseases, and recognizing these signs is important for treatment and management.

About 15% of adolescent girls in a region of India have Polycystic Ovarian Syndrome, which is more common in those born by cesarean, with wisdom teeth, or with central obesity.

Drug metabolism affects how long a drug works, its interactions, activation, and toxicity, and is influenced by genetics, diet, illness, and other drugs.

Some cosmetic procedures show promise for treating hair loss, but more research is needed to confirm their safety and effectiveness.

A woman's mature cystic teratoma caused her virilization by producing testosterone.

Toxoplasma gondii infection may increase testosterone levels in males.

Vegetarians should take B vitamin supplements to avoid health issues.

New medications are improving depression treatment, emphasizing accurate diagnosis and chronic care.

Both fluoxetine and clomipramine effectively treat dog lick dermatitis, but fluoxetine works faster with lower recurrence, while clomipramine has fewer side effects.

Hyperprolactinemia should be treated before confirming a PCOS diagnosis.

In 2011, there were major scientific breakthroughs in cancer treatment, immunity, Parkinson's, virus simulation, schizophrenia, hair growth, lung cancer, and medical grafts.

Medical treatments like chemotherapy and radiotherapy can harm sperm production, so freezing sperm before treatment is important for men who want children later.

Some cancer and immune system drugs can cause serious side effects, including heart, lung, nerve, and organ damage, which need careful monitoring and management.

Stem cell therapy is promising for treating various health conditions, but more research is needed to understand its full potential and address challenges.

Gene expression in hair follicles can help diagnose methamphetamine use disorder.

Significant progress and collaborations in stem cell research and regenerative medicine were made, including advancements in hair growth, cancer therapies, and treatments for neurological disorders.

Phosphorylation controls TFEB's location in the cell, affecting cell metabolism and stress response.

Metabolic signals and cell shape influence how cells develop and change.

Probiotics show promise for health benefits but need more research to understand how they work.

Genetic variations greatly affect individual metabolism and can impact health and disease risk.

Perilla frutescens, an East Asian plant, contains 400 bioactive compounds that have various health benefits, including anti-inflammatory, antidepressant, and anticancer effects, and can treat conditions like diabetes, skin allergies, and neurological disorders.

Saw palmetto extract may help treat brain tumors by blocking a specific growth signal and blood vessel formation.