Abortion
Those people who have already had several spontaneous or induced abortions run a greater risk of having a spontaneous one. Those with certain diseases, and those over the age 35 also run a greater risk. Other causes for abortions can be the infection of either the woman or embryo/fetus, or their immune response. Certain diseases or  an accidental trauma can also cause a spontaneous abortion.  Putting the woman under trauma or stress to cause miscarriage is considered induced abortion. Some countries call this feticide.