The effect of cetrorelix vs. ganirelix on pregnancy outcome using minimal gonadotropin stimulation in women with elevated day 3 serum follicle stimulating hormone levels.

The trend for lower pregnancy rates with ganirelix vs. cetrorelix seen in women with diminished egg reserve is consistent with the findings of a study performed in women with normal egg reserve using a normal gonadotropin stimulation regimen. It is not clear if the adverse effect is on the endometrium or the embryo.