Pregnancy is detected, it will end with abortion own 15-30 percent of the health and life of pregnant women. Because of abortion, most (percentage. 50) in the first quarter is a chromosome abnormality of the embryo or fetus. Other causes include mothers Vascular system diseases (such as lupus), diabetes, hormonal disorders, infections and disorders of the uterus. Age, pregnancy history and history of miscarriage in the past are two major risk factors for miscarriage. Abortion may be caused by an accident or stress to the body. Deliberately causing stress or violence to an abortion, miscarriage or fetal damage.