Objective: To synthesize current evidence on mechanisms, diagnostic evaluation, and treatment of infertility in PCOS, with emphasis on phenotype-specific implications and integrative management.
Methods: A narrative review was conducted using PubMed, Scopus, and Web of Science from January 2015 to March 2024. Search terms included “PCOS,” “infertility,” “phenotype,” “letrozole,” “metformin,” “gonadotropins,” and “ART.” Eligible studies involved human females aged 18–45 years, written in English, and focused on PCOS-related infertility. Randomized trials, meta-analyses, and international guidelines were critically assessed for methodological rigor and clinical relevance.
Results: PCOS accounts for 70–80% of anovulatory infertility, with marked variability across phenotypes. Phenotype A, combining hyperandrogenism, ovulatory dysfunction, and polycystic ovarian morphology, carries the greatest reproductive and metabolic burden. Biomarkers such as AMH, testosterone, DHEAS, fasting insulin, and HOMA-IR improve risk stratification. Lifestyle modification restores ovulation in up to 60% of overweight patients. Letrozole is superior to clomiphene, while gonadotropins and ART are effective in resistant cases. Metformin enhances ovulatory and pregnancy outcomes in insulin-resistant women. IVF protocols using antagonists and agonist triggers improve safety by reducing ovarian hyperstimulation syndrome. Psychological comorbidities, particularly anxiety and depression, are frequent and negatively affect fertility outcomes.
Conclusion: PCOS-related infertility requires a personalized, multidisciplinary approach. Integration of phenotype-based assessment, biomarker evaluation, lifestyle intervention, and tailored reproductive strategies optimizes outcomes. Addressing metabolic and psychological dimensions further improves reproductive success and long-term health.
Tag Archives: letrozole
Letrozole Determination by Capillary Zone Electrophoresis and UV Spectrophotometry Methods
Objective: Letrozole is a highly potent oral nonsteroidal aromatase inhibitor triazole derivative. The aim of this study was to quantify letrozole from bulk, pharmaceutical formulation, and spiked urine samples by developing a simple, rapid and cost effective capillary electrophoresis method. Methods: A capillary zone electrophoresis method was optimized and validated. Additionally, an UV spectrophotometry method was used for comparing results. Results:The capillary zone electrophoresis method using a 90 mM sodium tetraborate background electrolyte proved to be an efficient method for determination of letrozole in a very short time, less than 2 minutes, using 20 kV voltage, 50 mbar/2 seconds pressure and 50°C temperature as optimum parameters. Additionally, the UV spectrophotometry method proved to be simple and efficient to quantify letrozole from bulk material and pharmaceutical formulation with linearity of response between 5 to 20 µg·mL-1 concentrations. For both methods, validation parameters, including linearity, detection and quantification limits were determined. Also we proved that our electrophoretic method has potential in analyzing letrozole from biological samples, obtaining encouraging results on estimation of letrozole from spiked urine samples without any special treatment. Conclusions: To quantify letrozole from bulk material, pharmaceutical preparations, and spiked urine samples the capillary zone electrophoresis method using a tetraborate sodium background electrolyte has proven to be simple and appropriate. Also a simple UV spectrophotometric method has been developed and validated for the same purposes.