OBJECTIVE: To compare the efficacy of letrozole to recombinant FSH for ovarian stimulation combined with IUI in a group of patients that had failed to conceive after clomiphene citrate (CC) and IUI. DESIGN: Prospective randomized trial with human subjects. SETTING: University-based fertility center. PATIENT(S): Fifty couples with unexplained infertility that failed to conceive after three cycles of CC combined to IUI. INTERVENTION(S): Couples were randomized to undergo superovulation either with letrozole or with recombinant FSH combined to IUI. MAIN OUTCOME MEASURE(S): Clinical pregnancy per cycle of treatment and clinical pregnancy per couple. RESULT(S): Pregnancy rate (PR) per cycle was 8.9% in the letrozole group as compared with 14% in the gonadotropin IUI group. This resulted in a cumulative PR per couple of 24% versus 36% and a take home baby rate of 20% versus 28%. Endometrial thickness was significantly lower in the letrozole group (7.1 +/- 2.3 vs 8.6 +/- 1.8). CONCLUSION(S): Ovarian stimulation with letrozole is associated with acceptable PRs compared with gonadotropin with significant less cost, risks, and patient inconvenience.
RCT Entities:
OBJECTIVE: To compare the efficacy of letrozole to recombinant FSH for ovarian stimulation combined with IUI in a group of patients that had failed to conceive after clomiphene citrate (CC) and IUI. DESIGN: Prospective randomized trial with human subjects. SETTING: University-based fertility center. PATIENT(S): Fifty couples with unexplained infertility that failed to conceive after three cycles of CC combined to IUI. INTERVENTION(S): Couples were randomized to undergo superovulation either with letrozole or with recombinant FSH combined to IUI. MAIN OUTCOME MEASURE(S): Clinical pregnancy per cycle of treatment and clinical pregnancy per couple. RESULT(S): Pregnancy rate (PR) per cycle was 8.9% in the letrozole group as compared with 14% in the gonadotropin IUI group. This resulted in a cumulative PR per couple of 24% versus 36% and a take home baby rate of 20% versus 28%. Endometrial thickness was significantly lower in the letrozole group (7.1 +/- 2.3 vs 8.6 +/- 1.8). CONCLUSION(S): Ovarian stimulation with letrozole is associated with acceptable PRs compared with gonadotropin with significant less cost, risks, and patient inconvenience.
Authors: Michael P Diamond; Richard S Legro; Christos Coutifaris; Ruben Alvero; Randal D Robinson; Peter Casson; Gregory M Christman; Joel Ager; Hao Huang; Karl R Hansen; Valerie Baker; Rebecca Usadi; Aimee Seungdamrong; G Wright Bates; R Mitchell Rosen; Daniel Haisenleder; Stephen A Krawetz; Kurt Barnhart; J C Trussell; Dana Ohl; Yufeng Jin; Nanette Santoro; Esther Eisenberg; Heping Zhang Journal: N Engl J Med Date: 2015-09-24 Impact factor: 91.245
Authors: J A Wessel; N A Danhof; R van Eekelen; M P Diamond; R S Legro; K Peeraer; T M D'Hooghe; M Erdem; T Dankert; B J Cohlen; C Thyagaraju; B W J Mol; M Showell; M van Wely; M H Mochtar; R Wang Journal: Hum Reprod Update Date: 2022-08-25 Impact factor: 17.179
Authors: Antonio Requena; Julio Herrero; José Landeras; Esperanza Navarro; José L Neyro; Cristina Salvador; Rosa Tur; Justo Callejo; Miguel A Checa; Magí Farré; Juan J Espinós; Francesc Fábregues; María Graña-Barcia Journal: Hum Reprod Update Date: 2008-09-23 Impact factor: 15.610