Elias Gatos, M.D.
Surgeon Gynecologist – Obstetrician
Scientific Director emBIO Assisted Reproduction Unit

Intrauterine Insemination – IUI

It is the most simple, economically advantageous, and oldest assisted reproduction method during which the processed-activated sperm is placed in the female uterine cavity. Fertilisation results normally without any intervention.

When to apply it
In cases where the sperm shows moderate/mild disorders, when there is suspected cervical infertility (“hostile” cervical mucous preventing the passage of sperm), in cases of azoospermia, oligoasthenospermia, or immune infertility.
Heterologous insemination, i.e. using third-donor sperm is recommended when there is no chance of finding spermatozoa in the male partner even after special testicular biopsy tests.
It is essentially required that the young woman’s fallopian tubes are healthy.

The procedure at a glance
Insemination is a painless procedure not requiring anaesthesia.
On the day the wife is ovulating, the couple will come to the unit, where the husband will give a sperm sample collected to be processed at the lab, where biologists keep the most mobile spermatozoa. Upon sample processing, intrauterine insemination (~0.5ml) is performed using a flexible plastic tube.
The wife must remain calm and relaxed for a short period to avoid any uterine contractions and sperm elimination. Then, the couple may return home.

Success rates
The success rate is 20 – 25%.


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