Intrauterine Insemination (IUI)

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What is It?

Intrauterine insemination (IUI) is a common fertility procedure in which the sperm are washed, concentrated, and placed directly into a woman’s uterus.

How Does it Work?

By placing the sperm into the uterus, a greater number of motile sperm have a better chance to fertilize an egg.  Not only is the distance less for them to swim, but they also bypass many of the natural barriers in the vagina and the cervix.  With natural intercourse, very few of the sperm make it to the upper reproductive tract because they are hindered by the cervical mucus.

The process is similar to having a pap smear performed.  Minimal discomfort is typically experienced with an IUI, which usually is completed within a few minutes.  Intrauterine insemination is the treatment plan if there is mild male factor infertility such as decreased sperm concentrations and/or sperm motility.  Intrauterine insemination is also recommended in conjunction with controlled ovarian hyperstimulation (COH) in couples with unexplained infertility and couples affected by mild/moderate endometriosis. The success rates of COH and IUI approximates the normal of 20% per month that is seen in fertile couples.  However, the age of the woman and the fertility diagnosis can affect the success rate. If couples are not successful after 3-6 cycles of COH/IUI, a consultation is recommended to review the causes and possibly come up with a new plan.

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