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  • Title: A randomized clinical trial of clomiphene citrate versus low dose recombinant FSH for ovarian hyperstimulation in intrauterine insemination cycles for unexplained and male subfertility.
    Author: Dankert T, Kremer JA, Cohlen BJ, Hamilton CJ, Pasker-de Jong PC, Straatman H, van Dop PA.
    Journal: Hum Reprod; 2007 Mar; 22(3):792-7. PubMed ID: 17110396.
    Abstract:
    BACKGROUND: Controlled ovarian hyperstimulation with intrauterine insemination (IUI) is a widely accepted treatment for unexplained and male subfertility. No consensus exists about the drug of first choice to be used as hyperstimulation. This randomized multicentre trial using a parallel design compares the efficacy of clomiphene citrate (CC) with that of recombinant FSH (rFSH). METHODS: Couples with primary unexplained or male subfertility were randomized to receive CC or rFSH for ovarian hyperstimulation. The treatment was continued for up to four cycles unless pregnancy occurred. Cycles with more than three follicles were cancelled. Cumulative pregnancy rates and live birth rates were primary outcomes. Cancellation during treatment and multiple birth rates are secondary outcomes. Results were analysed following the intention-to-treat principle. RESULTS: Seventy couples with male subfertility and 68 couples with unexplained subfertility were included. Seventy-one women received CC, and 67 received rFSH. Twenty-seven pregnancies were observed in the CC group (38%) and 23 in the rFSH group (34.3%) relative risk (RR) 1.11 [95% confidence interval (95% CI) 0.71-1.73]. The live birth rate was 28.2% (20/71) and 26.9% (18/67) for CC and rFSH, respectively, RR 1.05 (95% CI 0.61-1.80). Overall, the live birth rates per cycle were 10% for CC-stimulated and 8.7% for rFSH stimulated cycles. The total multiple pregnancy rate was 6.0%. Thirty-five cycles (8.6%) were cancelled because of four or more follicles (CC, n = 17; rFSH, n = 18). CONCLUSIONS: In couples with primary unexplained or male subfertility participating in an IUI program, ovarian hyperstimulation can be achieved by CC or rFSH. No significant difference in live birth rates between CC and rFSH was observed. Being less expensive, CC seems the more cost-effective drug and therefore, can be offered as drug of first choice.
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