Aromatase inhibition improves ovarian response to follicle-stimulating hormone in poor responders

被引:155
作者
Mitwally, MFM
Casper, RF
机构
[1] Univ Toronto, Reprod Biol Unit, Mt Sinai Hosp, Toronto, ON M5G 1X5, Canada
[2] Univ Toronto, Samuel Lunenfeld Res Inst, Div Reprod Sci, Dept Obstet & Gynecol, Toronto, ON, Canada
基金
英国医学研究理事会;
关键词
aromatase; letrozole; aromatase inhibitors; FSH; ovarian stimulation; low responders; intrauterine insemination;
D O I
10.1016/S0015-0282(01)03280-0
中图分类号
R71 [妇产科学];
学科分类号
100211 ;
摘要
Objective: To examine the use of the aromatase inhibitor letrozole with FSH for ovarian stimulation in poor responders undergoing ovarian superovulation and IUI Design: Observational cohort study as a prospective clinical trial in patients with unexplained infertility and a low response to ovarian stimulation with FSH. Setting: Two tertiary referral infertility clinics associated with the Reproductive Sciences Division, University of Toronto. Patient(s): Twelve patients with unexplained infertility undergoing IUI who received FSH alone in 25 prior cycles with poor response (less than three dominant follicles). Intervention(s): Patients were offered letrozole, 2.5 mg/day from day 3-7 of the menstrual cycle with FSH (50-225 IU/day) starting on day 5-7. hCG (10,000 IU) was given when two leading follicles were greater than or equal to2 cm followed by IUI Main Outcome Measure(s): Number of mature follicles (> 1.8 cm), FSH dose, endometrial thickness, and pregnancy rate. Result(s): Improved response to FSH stimulation with letrozole co-treatment was evidenced by the significantly lower FSH dose associated with significantly higher number of mature follicles. During letrozole plus FSH stimulation cycles, clinical pregnancy was achieved in three cycles (21%). Conclusion(s): In this preliminary report, we demonstrate a potential benefit of aromatase inhibition for improving ovarian response to FSH in poor responders. (C) 2002 by American Society for Reproductive Medicine.
引用
收藏
页码:776 / 780
页数:5
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