research LC-MS/MS Improves Screening Towards 21-Hydroxylase Deficiency
LC-MS/MS is more reliable than immunoassays for diagnosing 21-hydroxylase deficiency.
Search
for
Sort by
Research
30 / 734 results 
research Revisiting Hyper- and Hypo-Androgenism by Tandem Mass Spectrometry
The document concludes that using LC-MS/MS for measuring androgens is more accurate than older methods, but it needs careful validation and standardized references to be most effective.
research Polycystic Ovary Syndrome and the Differential Diagnosis of Hyperandrogenism
The document concludes that careful evaluation is needed to diagnose PCOS correctly due to similar symptoms in other conditions, and accurate testosterone level measurement is crucial.
research Determining the Normal Cut-Off Levels for Hyperandrogenemia in Chinese Women of Reproductive Age
Normal levels for certain hormones in Chinese women of reproductive age were identified.
research Management of Endocrine Disease: Hyperandrogenic States in Women - Pitfalls in Laboratory Diagnosis
Diagnosing hyperandrogenism in women is complex and requires accurate testing methods and consideration of SHBG levels.
research Unusual Presentation of Denys-Drash Syndrome in a Girl with Undisclosed Consumption of Biotin
A girl with Denys-Drash syndrome was misdiagnosed due to biotin affecting her hormone test results.
research Determination of Estradiol and Progesterone Concentrations in Human Scalp Hair
Hair levels of estradiol and progesterone are higher in premenopausal than postmenopausal women, but the difference isn't statistically significant, indicating the need for a better measurement method.
research First Case of Degenerative Mucinotic Mural Folliculitis in Brazil
A cat in Brazil was found with a severe skin condition linked to feline AIDS.
research Testosterone Analysis in Hair
The method shows hair testosterone levels reflect those in saliva, but are affected by various factors and may indicate a risk for heart attack.
research Biotin: A Friend or Foe in Hair Loss
Biotin doesn't help hair growth in healthy people and can cause health risks if overused.
research Falsely Elevated Testosterone Levels: Role of LC-MS/MS in Reducing Unnecessary Testing
Using LC-MS/MS for hormone measurement can prevent false high testosterone results and avoid unnecessary tests.
research Diagnosis of Hyperandrogenism: Biochemical Criteria
The document concludes that accurate measurement of serum androgens is crucial for diagnosing hyperandrogenism.
research Synthesis of 11α-Hydroxyprogesterone Haptens
Researchers successfully made new compounds for hormone level tests, but one attempt led to an unexpected product, correcting a past error.
research Biotin Beware: Perils of Biotin Supplementation
Taking biotin supplements can be risky and often lacks evidence of effectiveness for skin, hair, and nail issues.
research Study of Fecal Glucocorticoid Metabolite in Bears: A Review
Analyzing bear poop helps measure their stress without harming them.
research Association Between Stress and Bilateral Symmetrical Alopecia in Free-Ranging Formosan Macaques in a High-Population-Density Area
Stress likely causes hair loss in Formosan macaques.
research Quantification of Reproductive Hormones in Hair of Captive Adult Brown Bears and Their Application as Indicators of Sex and Reproductive State
Measuring reproductive hormones in brown bear hair could help identify their sex and reproductive state, but better collection methods or lab techniques are needed.
research Ultrastructural Alterations and Environmental Exposure Influence the Opiate Concentrations in Hair of Drug Addicts
Environmental factors can greatly reduce drug levels in hair.
research Antimüllerian Hormone to Determine Polycystic Ovarian Morphology: The APHRODITE Study
A blood test level of 3.2 ng/mL of Antimüllerian hormone is good for identifying polycystic ovarian morphology in European women aged 25–45.
research How Biotin Induces Misleading Results in Thyroid Bioassays: Case Series
Taking biotin supplements can cause incorrect thyroid test results, leading to wrong diagnoses.
research Hirsutism and Virilization in the Female
The chapter explains the causes of excessive hair growth and masculinization in women and how to measure hormone levels related to these conditions.
research Androgens in Women: Critical Evaluation of Methods for Their Determination in Diagnosing Endocrine Disorders
The conclusion is that standardizing testosterone measurement methods is essential for better diagnosis accuracy in women.
research Follicle Hormones
Follicle Stimulating Hormone is important for fertility.
research A New Catalyst for Organic Synthesis: Mercuric Triflate
Mercuric triflate is an effective catalyst for various organic reactions, working well at room temperature with high yields.
research Sexual Function in Women with Androgen Excess Disorders: Classic Forms of Congenital Adrenal Hyperplasia and Polycystic Ovary Syndrome
Women with congenital adrenal hyperplasia (CAH) have more sexual function issues than those with polycystic ovary syndrome (PCOS), but physical activity can improve sexual functioning in all women.
research Association Between Stress and Bilateral Symmetrical Alopecia in Free-Ranging Formosan Macaques in Mt. Longevity, Taiwan
Stress is likely causing hair loss in Formosan macaques.
research Rethinking Biotin Therapy for Hair, Nail, and Skin Disorders
Biotin supplements are not proven to improve hair or nails and may interfere with medical tests.
research Exogenous IGF-1 Promotes Hair Growth by Stimulating Cell Proliferation and Downregulating TGF-β1 in C57BL/6 Mice In Vivo
IGF-1 injections help mice grow more hair by increasing cell growth and blocking a hair growth inhibitor.
research Serum Levels of Retinol-Binding Protein 4 and Adiponectin in Women with Polycystic Ovary Syndrome: Associations with Visceral Fat but No Evidence for Fat Mass-Independent Effects on Pathogenesis in This Condition
Women with PCOS have similar levels of certain proteins compared to women without PCOS, and these proteins don't independently cause PCOS.
research Acanthosis Nigricans, Insulin Resistance, And Cutaneous Virilism
Patients with acanthosis nigricans often have insulin resistance and signs of increased male hormones, but treatment targeting these male hormones is generally ineffective.