BACKGROUNDLetrozole is the third-generation aromatase inhibitor (AI) most widely used in assisted reproduction. AIs induce ovulation by inhibiting estrogen production; the consequent hypoestrogenic state increases GnRH release and pituitary follicle-stimulating hormone (FSH) synthesis.METHODSA systematic search of the literature was performed for both prospective and retrospective studies. Meta-analyses of randomized clinical trials (RCTs) were performed for three comparisons: letrozole versus clomiphene citrate (CC), letrozole + FSH versus FSH in intrauterine insemination (IUI) and letrozole + FSH versus FSH in IVF. In the absence of RCTs, non-randomized studies were pooled.RESULTSNine studies were included in the meta-analysis. Four RCTs compared the overall effect of letrozole with CC in patients with polycystic ovary syndrome. The pooled result was not significant for ovulatory cycles (OR = 1.17; 95% CI 0.66–2.09), or for pregnancy rate per cycle (OR = 1.47; 95% CI 0.73–2.96) or for pregnancy rate per patient (OR = 1.37; 95% CI 0.70–2.71). In three retrospective studies which compared L + FSH with FSH in ovarian stimulation for IUI, the pooled OR was 1.15 (95% CI 0.78−1.71). A final meta-analysis included one RCT and one cohort study that compared letrozole + gonadotrophin versus gonadotrophin alone: the pooled pregnancy rate per patient was not significantly different (OR = 1.40; 95% CI 0.67–2.91).CONCLUSIONSLetrozole is as effective as other methods of ovulation induction. Further randomized-controlled studies are warranted to define more clearly the efficacy and safety of letrozole in human reproduction.
The vagina, vulva, vestibule, labia majora/minora, and bladder trigone have a high concentration of estrogen receptors; therefore, they are a sensitive biological indicator of serum levels of these hormones in women. The estrogen loss in postmenopausal women produces a dysfunction called genitourinary syndrome of menopause. The principal therapeutic goal in the genitourinary syndrome of menopause is to relieve symptoms. Treatment options, as well as local and systemic hormonal treatment are changes in lifestyle and non-hormonal treatments mainly based on the use of moisturizers and lubricants. New treatments that have recently appeared are ospemifeme, the first selective hormone receptor modulator for dyspareunia and vulvovaginal atrophy treatment, and the use of vaginal laser. This review has been written with the intention of giving recommendations on the prevention and treatment of genitourinary syndrome of menopause.
The HRQoL analysis results in this study demonstrated a loss of quality of life in postmenopausal women with osteoporosis and confirmed that this loss is greater in women with prior osteoporotic fracture.
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