Abstract: The unintended pregnancy resulting in abortion is a worldwide problem，with multiple adverse effects on women. There was good evidence that the use of long-acting reversible contraception （LARC），including intra-uterine device，subdermal implant and injectable contraceptive，was associated with the lowered risk of unintended pregnancy. LARC is efficient，long-acting，fertility-reversible，safe and easy to use. Its effect is not dependent on the user′s compliance. Therefore，LARC methods are recommended to fertile women in the world.

Key words: Contraception, Long-action preparations, Intrauterine devices, Contraceptive implant, Contraceptive injection