Clinical uses

The progestogen helps reduce endometrial build up and so lightens periods and gives rise to its two licensed uses:

As a contraceptive, particularly suitable for those with very heavy menses.

As a treatment for menorrhagia (heavy periods) for women who might previously have required a hysterectomy.
The IUS, unlike IUDs, is not licensed for use as an Emergency contraception (Manufacturer states the progestogen, unlike copper, is not deleterious to the developing embryo).

The IUS, like the IUD is thought to be more suitable for women who have already had children as they will find dilating the cervix less uncomfortable. Doctors more experienced in fitting coils, such as Family Planning doctors rather than GPs, are usually more willing to consider women who have never given birth.

The IUS is not suitable as a method of safe sex, though it is a very effective contraceptive. It is therefore most suitable for women in long-term relationships without a high risk of STDs.

Fitting

The IUS can only be fitted by a doctor. The device should be inserted according to the manufacturer's instructions using aseptic technique to avoid adverse events. The process of opening the cervix (both to measure the uterus and insert the IUS) is uncomfortable and some women will even describe it as painful. Doctors often advise women to take painkillers before the procedure to reduce discomfort.

Once in place, the IUS will give reliable birth control for 5 years.