Following downregulated women of advanced reproductive age, superiority of HP-hMG over rFSH in live birth rate could not be concluded from this study, but noninferiority was established. Pharmacodynamic differences in follicular development, oocyte/embryo quality and endocrine response exist between HP-hMG and rFSH, which may be relevant to treatment outcome.
Luteal E(2) pre-treatment before GnRH antagonist protocol significantly increases serum LH level and incidence rate of premature LH but no significant effect is observed on implantation, clinical pregnancy, live birth and early pregnancy loss rates compared with long GnRH agonist protocol. However, more studies in large numbers of cycles are needed to confirm that increased serum LH level by E(2) pre-treatment during COH has no negative effect on the IVF/ICSI outcomes.
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