On the day of the ovulation, the man provides a sample of semen at the laboratory one or two hours before the insemination. The semen is processed to recover the mobile spermatozoons and concentrate them into a small volume. A cannula is then used to put them in the uterus to avoid the long journey they would naturally have to make from the vagina to the fallopian tube where the ovum-spermatozoon fertilisation takes place.

To increase the possibilities of success, the ovaries are usually gently stimulated to confirm the maturity of at least one or two ova. For this reason, the entire treatment is controlled with echographs. This shows the number of ova that will be produced and also sets the day on which the ovulation will begin. Even so, the possibilities of success with this technique are around 15-20% with each attempt. One out of every four pregnancies achieved are with twins.

To guarantee success, we must make sure there is at least one permeable fallopian tube and at least 2-3 million progressively mobile spermatozoons. However, if after 3-4 cycles of insemination, the pregnancy is not successful, we recommend moving on to in vitro fertilisation.