Stimulated intrauterine insemination (IUI) - the risks

Intrauterine insemination (IUI) may be used with or without fertility drugs. At the time of IUI treatment, the best quality sperm is selected. They are then inserted into the womb at the woman’s most fertile time, when an ovary releases an egg (ovulation).

How does stimulated IUI affect the risk of multiple birth?

Stimulated IUI may increase your risk of a multiple birth because, when fertility drugs are used, a greater number of eggs may be produced than with a natural cycle. And unlike IVF, the clinic does not control the number of embryos that can develop, although they can monitor what happens.

If you are young, healthy and have a good chance of conceiving with stimulated IUI, your risk of having twins or more may be over 20%.

For more information about IUI - visit the HFEA website

INUK logo

Multiple birth factsheet for patients

Are you going through fertility treatment and want to know more about the risks of multiple births?

Infertility Network UK (INUK) has published a factsheet that addresses a number of common concerns and questions that fertility treatment patients have.

Support groups

If you are concerned about any issues connected with multiple pregnancy and birth, you can get help and advice from a number of sources.

Find out more>>