In general, women who are ovulating normally can try IUI for a maximum of 3–4 months whereas women having polycystic ovaries (PCOD) or are taking medication for ovulation can try longer (about 6 months). If the IUI with Clomid is unsuccessful, your doctors might suggest IUI with gonadotropins, before taking the IVF route. In most cases, the success rate of IUI with gonadotropins is much higher than that of IUI with Clomid. 85–90% of women who get IUI with injectable gonadotropins conceive successfully after 4 to 6 cycles.