Cetrotide is typically used in IVF to prevent premature ovulation and is less common in IUI, as IUI does not usually require such controlled ovarian stimulation.

Cetrotide can be used with IUI to help time ovulation more precisely, potentially increasing the chances of successful fertilization and pregnancy.

Using Cetrotide in IUI protocols may enhance fertility by preventing premature LH surges, thus timing ovulation more accurately, but is less commonly needed than in IVF.

Cetrotide is not standard for IUI as it is for IVF, because IUI involves less intense ovarian stimulation, reducing the need for such stringent control of ovulation.