Sperm suspension can be placed in the cervix, the uterus, the peritoneum or the Fallopian tube. It is guided by introducing a 0.2 – 0.5 ml sperm suspension into the uterus using a small catheter. With Fallopian tube sperm perfusion (FSP), the inseminating material is 4 ml, so with this large volume of fluid, material can not only fill the uterine cavity and Fallopian tubes, but some of the volume may even end up in the abdominal cavity. If semen sample is freezed, IUI is more suitable than intracervical insemination (ICI) the probability of live birth after six insemination cycles is 2-times higher.