Complete - The complete expulsion or extraction from its mother of a fetus or embryo; complete expulsion from the uterus of any other product of conception (for example, blighted ovum).
Elective - Without medical justification but performed in a legal way.
Incomplete - Part of the products of conception have been passed, but part (usually the placenta) remains in the uterus.
Induced - Expulsion of the fetus and products of conception brought on purposefully by drugs or mechanical means.
Inevitable - Characterized by rupture of the membranes in the presence of cervical dilation in a previable pregnancy.
Missed - Death of the fetus in utero prior to 22 weeks, with retention of the products of conception
Septic - An infectious abortion complicated by fever, endometriosis or parametritis.
Spontaneous - An abortion that has not been induced artificially. This term is usually limited to pregnancies of less than 22 weeks gestation.