A woman can be pregnant if mans sperm reaches one of her eggs (ova). Contraception will tries to stop this happening by keeping the egg & sperm apart or by stopping the egg production. One method of contraception is called IUS, or intrauterine system (sometimes called as hormonal coil).
An IUSis a small, T-shaped plastic device which is inserted into the womb (uterus) by a specially experienced and trained doctor. The IUS releases a progestogen hormone into the womb. This will thickens the mucus from the cervix, making it difficult for the sperm to move through & reach an egg. It will also thin the womb lining so that it is less likely to accept a fertilized egg. It may also stop the ovulation (the release of an egg) to occur in some women.
The IUS is a long-acting reversible contraceptive (LARC) technique.It works for 5 years or 3 years, based on the type, so you wont have to think about the contraception every day or each time when you are having sex.