Background: The objective of this systematic review was to assess the safety and efficacy of subcutaneous recombinant (r) HCG and high-dose rLH compared with intramuscular urinary (u) uHCG for inducing final oocyte maturation and triggering ovulation.
Methods: We searched the Cochrane Menstrual Disorders and Subfertility Group trials register (August 27, 2003), the Cochrane Central Register of Controlled Trials (CENTRAL on The Cochrane Library, issue 4, 2003), MEDLINE (1966 to February 2004) and EMBASE (1980 to February 2004). Searches were not limited by language. The bibliographies of included and excluded trials and abstracts of major meetings were searched for additional trials. Authors and pharmaceutical companies were contacted for missing and unpublished data. Only truly randomized controlled trials (RCTs) were included. Assessment of inclusion/exclusion, quality assessment and data extraction were performed independently by at least two reviewers.
Results: Seven RCTs were identified, four comparing rHCG and uHCG and three comparing rhLH and uHCG. There was no statistically significant difference between rHCG and uHCG regarding the ongoing pregnancy/live birth rate [odds ratio (OR) 0.98; 95% confidence interval (CI) 0.69-1.39], clinical pregnancy rate, miscarriage rate or incidence of ovarian hyperstimulation syndrome (OHSS). There was no statistically significant difference between rhLH and uHCG regarding the ongoing pregnancy/live birth rate (OR 0.94; 95% CI 0.50-1.76), pregnancy rate, miscarriage rate or incidence of OHSS. rHCG was associated with a reduction in the incidence of local site reactions (OR 0.47; 95% CI 0.32-0.70).
Conclusions: According to these data, there is no evidence of a difference in clinical outcomes between urinary and recombinant gonadotrophins used for induction of final follicular maturation. Additional factors should be considered when choosing gonadotrophin type, including safety, cost and drug availability.
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