Vacuum or suction aspiration uses aspiration to remove the contents of the uterus through the cervix. It is a method of induced abortion as well as a therapeutic procedure used after miscarriage. The rate of infection is lower than any other surgical abortion procedure at 0.5%.[1] Some sources may use the terms dilation and evacuation[2] or "suction" dilation and curettage[3] to refer to vacuum aspiration, although those terms are normally used to refer to distinct procedures.
http://en.wikipedia.org/wiki/Suction-aspiration_abortion