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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.

Calcium reduces involucrin in rat hair bulbs but doesn't affect filaggrin and Kdap.

The placebo microneedle stamp didn't penetrate skin and caused less pain, but blinding was only effective for those with low skin sensitivity.

Tithonia diversifolia extract improved digestion but didn't enhance lamb growth.

Older adults in Puerto Rico often couldn't be tested for hair cortisol due to refusal or lack of hair, with race and hair products affecting results.

Hair analysis can confirm drug use but can't accurately measure how much was taken.

Adolescents with hair loss show different hormone levels by sex and often have related metabolic issues.

Lupus can cause a type of hair loss that doesn't scar, due to inflammation.

Somatostatin analogues effectively manage ectopic ACTH syndrome when surgery isn't possible.

High-dose intravenous iron therapy doesn't interfere with treatment improvements in IBD patients with iron deficiency anemia.

A new method accurately measures finasteride levels in blood and shows how the body processes it.

Early-onset hair loss in Koreans isn't linked to other health issues.

Dutasteride and finasteride may reduce sperm count and volume but don't affect movement or shape; effects are reversible after stopping.

Cavity macrophages gather on organ surfaces but don't really invade or help repair the organs after injury.

Adding more glutathione to the preservation solution doesn't reduce oxidative stress in hair transplants.

Breathing in fine particles or Asian dust short-term doesn't affect schoolchildren's skin symptoms.

Treatments improved hair surface and scale structure but didn't increase certain bonds in the hair cortex.

Electric current quickly reduces hand sweating but the effect doesn't last long.

The project improved provider knowledge about PCOS but didn't significantly change diagnosis and management practices.

A man with Klinefelter syndrome had a leg ulcer that didn't heal well, even with treatment.

Allium cepa extract restores skin health but doesn't affect hair growth.

Goserelin injections can effectively manage hyperandrogenism symptoms in postmenopausal women who can't have surgery.

Prairie dogs with fewer neighbors are more stressed but their number of babies isn't affected.

Removing one ovary helped treat a woman's severe PCOS symptoms when medicine didn't work.

Using GnRHa agonists helps diagnose and treat ovarian hyperthecosis when surgery isn't possible.

5α-reductase inhibitors may worsen sexual drive and spontaneous erections but don't worsen existing erectile or ejaculatory problems.

The study concluded that androstendione and DHEA are important for diagnosing high male hormone levels in women with excessive hair growth.

Dihydrotestosterone treatment can help penis growth in boys with 5α-reductase deficiency but doesn't fully normalize size after puberty.

Finasteride treats enlarged prostate, shrinks it, improves urination, but may cause sexual dysfunction and isn't for women or children.

A girl with rickets and hair loss was found to have a rare condition where her body didn't respond to vitamin D treatment.