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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.

The research suggests that Tourette syndrome is linked to both brain signaling and immune system pathways.

Finasteride reduces alcohol withdrawal effects, especially in female mice.

New resveratrol-related compounds show promise for treating various health issues but need more research for clinical use.

Menopausal women have higher androgen levels, which can cause symptoms like facial hair growth and low sexual desire.

Post-finasteride syndrome causes lasting sexual, neurological, and physical side effects in some people after taking finasteride.

Using neurohormones to control keratin can lead to new skin disease treatments.

17α-estradiol is a safe estrogen that might protect the brain and doesn't cause feminization, needing more research for treating brain diseases.

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

Many skin patients also have mental health issues, and doctors should treat both together.

Activated carbon fibers from Metaplexis japonica seed hair are highly effective for removing the dye methylene blue from water.

Mutations in the HEPHL1 gene cause abnormal hair and cognitive issues.

Hormonal imbalances, often indicating conditions like PCOS, are common in women with hard-to-treat acne, and a treatment approach addressing these imbalances may be needed.

Gilles de la Tourette syndrome is treatable, with behavioral therapy as a recommended first option and other treatments available for more severe cases.

Hormonal treatment is effective for women with acne not helped by usual treatments, especially if they have hormonal imbalances.

Using computers to analyze drugs can find new uses for them, but actual experiments are needed to confirm these uses.

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.

Birth control pills help treat skin and hair growth problems linked to high male hormone levels.

Lack or blocking of SRD5a, a key component in hormone creation, can lead to conditions like pseudohermaphrodism and affect hair growth, bone mass, muscle strength, and reproductive health. More research is needed on its regulation from fertilization to adulthood.

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.

Finasteride reduces response to stress and rewards, affecting behavior and mental health.

SSRI antidepressants can cause long-lasting sexual problems.

The conclusion is that removing both ovaries is the best treatment for excess male hormones in postmenopausal women, with medication as another option, and managing insulin resistance is important for diagnosis and treatment.

Dog hair grows back in about 14 weeks after being clipped for surgery, and the season doesn't really affect this growth rate.

Moderately high prolactin levels do not cause hair loss in women.

Some chemicals absorbed through the skin can cause serious health problems.

Natural plant products like Proanthocyanidins and curcumin may help treat ischemic stroke by reducing inflammation.

The enzymes 5α-reductase and 3α/β-hydroxysteroid oxidoreductase help create brain-active substances from progesterone and testosterone, which could be used for treatment, but more research is needed to ensure their safety and effectiveness.

Inositol was not more effective than a placebo in treating trichotillomania.