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Forest plot of studies evaluating optimal embryos rate (A); fertilization rate (B); live birth rate (C); cleavage rate (D); embryo implantation rate (E); E2 on the day of hCG (F); early miscarriage rate (G); LH on the day of hCG (H); cumulative pregnancy rate (I); duration of gonadotropin (J); total dose of gonadotropin (K).
